Fix slime hair translucent (#14478)

* fix

* move

Content.Shared/Humanoid/Markings/MarkingsSet.cs

@@ -190,9 +190,9 @@ public sealed class MarkingSet
                 foreach (var marking in list)
                 {
                     if (markingManager.TryGetMarking(marking, out var prototype) &&
-                        markingManager.MustMatchSkin(species, prototype.BodyPart, prototypeManager))
+                        markingManager.MustMatchSkin(species, prototype.BodyPart, out var alpha, prototypeManager))
                     {
-                        marking.SetColor(skinColor.Value);
+                        marking.SetColor(skinColor.Value.WithAlpha(alpha));
                     }
                 }
             }