diff --git a/API/Controllers/TeamsController.cs b/API/Controllers/TeamsController.cs
index 7ef3ca6..348d7ae 100644
--- a/API/Controllers/TeamsController.cs
+++ b/API/Controllers/TeamsController.cs
@@ -16,8 +16,8 @@ public class TeamsController(ITeamService service, ITacticService tactics,IConte
     public record CreateTeamRequest(
         [Name] string Name,
         [Url] string Picture,
-        [RegularExpression("^#[0-9A-F]{6}$")] string FirstColor,
-        [RegularExpression("^#[0-9A-F]{6}$")] string SecondColor
+        [RegularExpression("^#[0-9A-Fa-f]{6}$")] string FirstColor,
+        [RegularExpression("^#[0-9A-Fa-f]{6}$")] string SecondColor
     );
 
     [HttpPost("/teams")]