diff --git a/apps/main/src/components/NavigationBar.tsx b/apps/main/src/components/NavigationBar.tsx
index b633b23..ea1992f 100644
--- a/apps/main/src/components/NavigationBar.tsx
+++ b/apps/main/src/components/NavigationBar.tsx
@@ -69,8 +69,8 @@ function NavLink({ isActive, children }: NavLinkProps) {
         "*:data-[ui=notification-badge]:text-xs/6",
         "*:data-[ui=notification-badge]:font-semibold",
         isActive
-          ? "bg-navbar-darker font-semibold text-white *:data-[ui=notification-badge]:bg-transparent"
-          : ["font-medium", "text-gray-300/90 [&:not(:hover)>[data-ui=icon]]:bg-navbar-darker"]
+          ? "bg-navbar-darker font-semibold text-gray-900 dark:text-white *:data-[ui=notification-badge]:bg-transparent"
+          : ["font-medium", "text-gray-500 dark:text-gray-300/90 [&:not(:hover)>[data-ui=icon]]:bg-navbar-darker"]
       )}
     >
       {children}
@@ -84,13 +84,13 @@ export function UserMenuPopover({ isCollapsed }: { isCollapsed: boolean }) {
   const { t } = useTranslation("navigation");
 
   const MenuSeparator = () => {
-    return <DropdownMenuSeparator className="bg-gray-500!" />;
+    return <DropdownMenuSeparator className="bg-gray-300 dark:bg-gray-500!" />;
   };
 
   const itemVariants = cva("", {
     variants: {
       variant: {
-        default: "text-gray-200/90 focus:bg-gray-500/80 focus:text-white",
+        default: "text-gray-600 dark:text-gray-200/90 focus:bg-gray-200/80 dark:focus:bg-gray-500/80 focus:text-gray-900 dark:focus:text-white",
         destructive: "text-red-500/80 focus:bg-red-500/80 focus:text-white",
       },
     },
@@ -136,10 +136,10 @@ export function UserMenuPopover({ isCollapsed }: { isCollapsed: boolean }) {
           </Avatar>
           {!isCollapsed && (
             <div className="flex flex-col items-start">
-              <TypographyMuted className="text-gray-300/90 transition-all duration-300 ml-1 truncate font-medium overflow-hidden text-ellipsis">
+              <TypographyMuted className="text-gray-700 dark:text-gray-300/90 transition-all duration-300 ml-1 truncate font-medium overflow-hidden text-ellipsis">
                 {user.first_name} {user.last_name}
               </TypographyMuted>
-              <TypographyMuted className="text-gray-400/90 transition-all duration-300 ml-1 text-xs truncate overflow-hidden text-ellipsis">
+              <TypographyMuted className="text-gray-500 dark:text-gray-400/90 transition-all duration-300 ml-1 text-xs truncate overflow-hidden text-ellipsis">
                 {user.email}
               </TypographyMuted>
             </div>
@@ -147,7 +147,7 @@ export function UserMenuPopover({ isCollapsed }: { isCollapsed: boolean }) {
         </Button>
       </DropdownMenuTrigger>
       <DropdownMenuContent
-        className="min-w-56 bg-navbar-background border-gray-600/50 p-1 rounded-lg text-white"
+        className="min-w-56 bg-navbar-background border-gray-300 dark:border-gray-600/50 p-1 rounded-lg text-gray-900 dark:text-white"
         side="right"
         align="end"
         sideOffset={-8}
@@ -155,7 +155,7 @@ export function UserMenuPopover({ isCollapsed }: { isCollapsed: boolean }) {
         <div className="flex gap-2 p-1">
           <Avatar className="size-8">
             <AvatarImage src={user.avatar_url ?? undefined} alt={user.name ?? "User avatar"} />
-            <AvatarFallback className="bg-gray-700 text-white">
+            <AvatarFallback className="bg-gray-300 dark:bg-gray-700 text-gray-700 dark:text-white">
               {user.name?.charAt(0).toUpperCase()}
             </AvatarFallback>
             <AvatarBadge className="size-3">
@@ -163,10 +163,10 @@ export function UserMenuPopover({ isCollapsed }: { isCollapsed: boolean }) {
             </AvatarBadge>
           </Avatar>
           <div className="flex flex-col gap-0.5 min-w-0 flex-1">
-            <TypographyMuted className="font-bold text-gray-100 text-sm truncate">
+            <TypographyMuted className="font-bold text-gray-800 dark:text-gray-100 text-sm truncate">
               {user.name}
             </TypographyMuted>
-            <TypographyMuted className="text-gray-300 text-xs truncate">
+            <TypographyMuted className="text-gray-500 dark:text-gray-300 text-xs truncate">
               {user.email}
             </TypographyMuted>
           </div>
@@ -248,7 +248,7 @@ export const SideNavigation = ({ isMobileMenuOpen }: { isMobileMenuOpen: boolean
           />
           <h1
             className={twMerge(
-              "text-lg font-bold transition-all duration-300 text-white whitespace-nowrap",
+              "text-lg font-bold transition-all duration-300 text-gray-900 dark:text-white whitespace-nowrap",
               isCollapsed ? "w-0 h-0 opacity-0" : "w-auto opacity-100"
             )}
           >
@@ -265,7 +265,7 @@ export const SideNavigation = ({ isMobileMenuOpen }: { isMobileMenuOpen: boolean
             className={twMerge(
               isCollapsed ? "relative" : "absolute top-2 right-2",
               "size-5 p-1",
-              "text-gray-300 hover:text-white",
+              "text-gray-500 dark:text-gray-300 hover:text-gray-900 dark:hover:text-white",
               "transition-all duration-300",
               "bg-navbar-background",
               "rounded-full shadow-md",
@@ -300,9 +300,9 @@ function RecentProjectsSection() {
 
   return (
     <div className="px-2 pb-2">
-      <Separator className="border-gray-300/20 mb-3" />
+      <Separator className="border-gray-300 dark:border-gray-300/20 mb-3" />
       <div className="px-2 mb-2">
-        <span className="text-[10px] font-semibold text-gray-400 uppercase tracking-wider">
+        <span className="text-[10px] font-semibold text-gray-500 dark:text-gray-400 uppercase tracking-wider">
           {t("projects", "Projects")}
         </span>
       </div>
@@ -316,12 +316,12 @@ function RecentProjectsSection() {
                 className={twMerge(
                   "flex items-center gap-2.5 px-2 py-1.5 rounded-lg text-sm transition-colors",
                   isActive
-                    ? "bg-navbar-darker text-white font-semibold"
-                    : "text-gray-300/90 hover:bg-navbar-darker hover:text-white"
+                    ? "bg-navbar-darker text-gray-900 dark:text-white font-semibold"
+                    : "text-gray-500 dark:text-gray-300/90 hover:bg-navbar-darker hover:text-gray-900 dark:hover:text-white"
                 )}
               >
                 <span
-                  className="w-5 h-5 rounded-md shrink-0 flex items-center justify-center text-xs font-bold text-white"
+                  className="w-6 h-6 rounded-full shrink-0 flex items-center justify-center text-xs font-bold text-gray-700 dark:text-white border border-gray-400 dark:border-gray-500/50"
                   style={{ backgroundColor: tablo.color ?? "#6b7280" }}
                 >
                   {tablo.name.charAt(0).toUpperCase()}
@@ -437,7 +437,7 @@ export function MainNavigation({ isCollapsed }: { isCollapsed: boolean }) {
           if ("isHorizontalBar" in item) {
             return (
               <li key={`horizontal-bar-${index}`} className="my-2">
-                <Separator className="border-gray-300/20" />
+                <Separator className="border-gray-300 dark:border-gray-300/20" />
               </li>
             );
           }
@@ -458,7 +458,7 @@ export function MainNavigation({ isCollapsed }: { isCollapsed: boolean }) {
                     <TypographyLarge
                       className={twMerge(
                         "text-base transition-all duration-300 font-normal",
-                        isActive ? "text-white" : "text-gray-300/90",
+                        isActive ? "text-gray-900 dark:text-white" : "text-gray-500 dark:text-gray-300/90",
                         isCollapsed ? "opacity-0 w-0 hidden" : "opacity-100"
                       )}
                     >
@@ -621,7 +621,7 @@ export function MainNavigation({ isCollapsed }: { isCollapsed: boolean }) {
                 <TypographyLarge
                   className={twMerge(
                     "text-base transition-all duration-300 font-normal",
-                    location.pathname === "/feedback" ? "text-white" : "text-gray-300/90",
+                    location.pathname === "/feedback" ? "text-gray-900 dark:text-white" : "text-gray-500 dark:text-gray-300/90",
                     isCollapsed ? "opacity-0 w-0 hidden" : "opacity-100"
                   )}
                 >
@@ -632,7 +632,7 @@ export function MainNavigation({ isCollapsed }: { isCollapsed: boolean }) {
           </NavLink>
         </li>
         <li className="my-2">
-          <Separator className="border-gray-300/20" />
+          <Separator className="border-gray-300 dark:border-gray-300/20" />
         </li>
       </ul>
     </nav>
diff --git a/apps/main/src/components/TopBar.tsx b/apps/main/src/components/TopBar.tsx
index e6b9107..f224607 100644
--- a/apps/main/src/components/TopBar.tsx
+++ b/apps/main/src/components/TopBar.tsx
@@ -341,7 +341,7 @@ export function TopBar() {
   };
 
   return (
-    <header className="h-[75px] flex items-center justify-between px-6 gap-4 border-b border-[#EAECF0] dark:border-gray-700 bg-white dark:bg-navbar-background shrink-0">
+    <header className="h-[75px] flex items-center justify-between px-6 gap-4 border-b border-[#EAECF0] dark:border-gray-700 bg-navbar-background shrink-0">
       <div className="relative flex-1 max-w-sm">
         <SearchIcon className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-gray-400 dark:text-gray-500 pointer-events-none" />
         <input
diff --git a/apps/main/src/main.css b/apps/main/src/main.css
index 1a69877..c3b1f5d 100644
--- a/apps/main/src/main.css
+++ b/apps/main/src/main.css
@@ -37,6 +37,8 @@
   --sidebar-accent-foreground: oklch(0.205 0 0);
   --sidebar-border: oklch(0.922 0 0);
   --sidebar-ring: oklch(0.708 0 0);
+  --navbar-background: rgb(249, 250, 251);
+  --navbar-darker: #e5e7eb;
 }
 
 .dark {
@@ -72,6 +74,8 @@
   --sidebar-accent-foreground: oklch(0.985 0.005 290);
   --sidebar-border: oklch(0.26 0.02 290);
   --sidebar-ring: oklch(0.45 0.03 290);
+  --navbar-background: #1e1b2e;
+  --navbar-darker: #141121;
 }
 
 @theme inline {
@@ -111,8 +115,8 @@
   --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
   --color-sidebar-border: var(--sidebar-border);
   --color-sidebar-ring: var(--sidebar-ring);
-  --color-navbar-background: #1e1b2e;
-  --color-navbar-darker: #141121;
+  --color-navbar-background: var(--navbar-background);
+  --color-navbar-darker: var(--navbar-darker);
 }
 
 @layer base {
diff --git a/apps/main/src/pages/tablo-details.tsx b/apps/main/src/pages/tablo-details.tsx
index d2f8cf9..801aebf 100644
--- a/apps/main/src/pages/tablo-details.tsx
+++ b/apps/main/src/pages/tablo-details.tsx
@@ -2,6 +2,16 @@ import { cn, toast } from "@xtablo/shared";
 import type { UserTablo } from "@xtablo/shared/types/tablos.types";
 import type { Etape, KanbanTask } from "@xtablo/shared-types";
 import { LoadingSpinner } from "@ui/components/LoadingSpinner";
+import { Avatar, AvatarFallback, AvatarImage } from "@xtablo/ui/components/avatar";
+import { Button } from "@xtablo/ui/components/button";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from "@xtablo/ui/components/dialog";
+import { Input } from "@xtablo/ui/components/input";
 import {
   CalendarIcon,
   ChevronDownIcon,
@@ -30,9 +40,12 @@ import { TabloDiscussionSection } from "../components/TabloDiscussionSection";
 import { TabloEventsSection } from "../components/TabloEventsSection";
 import { TabloFilesSection } from "../components/TabloFilesSection";
 import { TabloTasksSection } from "../components/TabloTasksSection";
+import { useInviteUser } from "../hooks/invite";
+import { usePendingTabloInvitesByTablo } from "../hooks/tablo_invites";
 import { useAllTasks, useCreateTask, useTabloEtapes } from "../hooks/tasks";
 import { useTabloFileNames } from "../hooks/tablo_data";
-import { useTablosList } from "../hooks/tablos";
+import { useTablosList, useTabloMembers } from "../hooks/tablos";
+import { useUser } from "../providers/UserStoreProvider";
 
 // ─── Status helpers ───────────────────────────────────────────────────────────
 
@@ -100,6 +113,29 @@ export const TabloDetailsPage = () => {
   const { data: tablos, isLoading } = useTablosList();
 
   const [isTaskModalOpen, setIsTaskModalOpen] = useState(false);
+  const [isShareDialogOpen, setIsShareDialogOpen] = useState(false);
+  const [inviteEmail, setInviteEmail] = useState("");
+
+  const currentUser = useUser();
+  const { data: members } = useTabloMembers(tabloId ?? "");
+  const { data: pendingInvites } = usePendingTabloInvitesByTablo(tabloId ?? "");
+  const { mutate: inviteUser, isPending: isInvitingUser } = useInviteUser();
+
+  const isEmailValid = (email: string): boolean => {
+    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+    return emailRegex.test(email);
+  };
+
+  const handleSendInvite = () => {
+    if (inviteEmail.trim() && tabloId) {
+      inviteUser({ email: inviteEmail, tablo_id: tabloId });
+      setInviteEmail("");
+    }
+  };
+
+  const filteredMembers = members?.filter(
+    (member) => !pendingInvites?.some((invite) => invite.invited_email === member.email),
+  );
 
   const sectionParam = searchParams.get("section") as TabSection | null;
   const activeSection: TabSection =
@@ -196,17 +232,16 @@ export const TabloDetailsPage = () => {
               <MessageCircleIcon className="w-5 h-5" />
               Discussion
             </Link>
-            <button
-              type="button"
-              disabled
-              className="border border-border text-muted-foreground font-medium py-2 px-4 rounded-lg flex items-center gap-2 opacity-60 cursor-not-allowed"
-            >
-              <UserPlusIcon className="w-5 h-5" />
-              Inviter
-              <span className="text-[10px] font-medium px-1.5 py-0.5 rounded-full bg-gray-100 dark:bg-gray-700 text-gray-500 dark:text-gray-400 leading-none">
-                Bientôt
-              </span>
-            </button>
+            {isAdmin && (
+              <button
+                type="button"
+                onClick={() => setIsShareDialogOpen(true)}
+                className="border border-[#804EEC] text-[#804EEC] hover:bg-[#804EEC]/10 font-medium py-2 px-4 rounded-lg flex items-center gap-2 transition-colors"
+              >
+                <UserPlusIcon className="w-5 h-5" />
+                Inviter
+              </button>
+            )}
           </div>
         </div>
 
@@ -479,6 +514,106 @@ export const TabloDetailsPage = () => {
           initialStatus="todo"
         />
       )}
+
+      {/* Share / Invite Dialog */}
+      <Dialog open={isShareDialogOpen} onOpenChange={setIsShareDialogOpen}>
+        <DialogContent className="max-w-md">
+          <DialogHeader>
+            <DialogTitle>Partager le projet</DialogTitle>
+            <DialogDescription>Invitez des personnes à collaborer sur ce projet</DialogDescription>
+          </DialogHeader>
+
+          <div className="space-y-4">
+            {/* Invite Input */}
+            <div className="flex space-x-2">
+              <Input
+                type="email"
+                value={inviteEmail}
+                onChange={(e) => setInviteEmail(e.target.value)}
+                placeholder="Email de l'utilisateur"
+                className="flex-1"
+              />
+              {isInvitingUser ? (
+                <div className="flex justify-center items-center px-4">
+                  <div className="animate-spin rounded-full h-4 w-4 border-b-2 border-primary" />
+                </div>
+              ) : (
+                <Button
+                  type="button"
+                  onClick={handleSendInvite}
+                  disabled={!isEmailValid(inviteEmail)}
+                >
+                  Inviter
+                </Button>
+              )}
+            </div>
+
+            {/* Pending Invites */}
+            {pendingInvites && pendingInvites.length > 0 && (
+              <div>
+                <h4 className="text-sm font-semibold text-foreground mb-2">
+                  Invitations en attente ({pendingInvites.length})
+                </h4>
+                <div className="space-y-2 max-h-32 overflow-y-auto">
+                  {pendingInvites.map((invite) => (
+                    <div
+                      key={invite.id}
+                      className="flex items-center space-x-2 p-2 bg-orange-50 dark:bg-orange-950/20 rounded-lg border border-dashed border-orange-200 dark:border-orange-900/50"
+                    >
+                      <div className="w-8 h-8 bg-orange-100 dark:bg-orange-900/30 rounded-full flex items-center justify-center text-orange-600 dark:text-orange-400 text-xs">
+                        <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M3 8l7.89 5.26a2 2 0 002.22 0L21 8M5 19h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z" />
+                        </svg>
+                      </div>
+                      <div className="flex-1 min-w-0">
+                        <span className="text-xs font-medium text-foreground truncate block">
+                          {invite.invited_email}
+                        </span>
+                      </div>
+                    </div>
+                  ))}
+                </div>
+              </div>
+            )}
+
+            {/* Members List */}
+            {filteredMembers && filteredMembers.length > 0 && (
+              <div>
+                <h4 className="text-sm font-semibold text-foreground mb-2">
+                  Membres ({filteredMembers.length})
+                </h4>
+                <div className="space-y-2 max-h-48 overflow-y-auto">
+                  {filteredMembers.map((member) => {
+                    const isCurrentUser = member.id === currentUser.id;
+                    const avatarUrl = isCurrentUser ? currentUser.avatar_url : null;
+                    return (
+                      <div
+                        key={member.id}
+                        className="flex items-center space-x-2 p-2 bg-muted rounded-lg"
+                      >
+                        <Avatar className="w-8 h-8">
+                          {avatarUrl && <AvatarImage src={avatarUrl} alt={member.name} />}
+                          <AvatarFallback className="bg-primary text-primary-foreground text-xs font-medium">
+                            {member.name.charAt(0).toUpperCase()}
+                          </AvatarFallback>
+                        </Avatar>
+                        <div className="flex-1 min-w-0">
+                          <span className="text-xs font-medium text-foreground truncate block">
+                            {member.name}
+                          </span>
+                          <span className="text-xs text-muted-foreground">
+                            {member.is_admin ? "Admin" : "Invité"}
+                          </span>
+                        </div>
+                      </div>
+                    );
+                  })}
+                </div>
+              </div>
+            )}
+          </div>
+        </DialogContent>
+      </Dialog>
     </div>
   );
 };