diff --git a/client/ayon_core/tools/utils/lib.py b/client/ayon_core/tools/utils/lib.py
index f31bb82e59..250d267e76 100644
--- a/client/ayon_core/tools/utils/lib.py
+++ b/client/ayon_core/tools/utils/lib.py
@@ -485,7 +485,10 @@ def _get_cache_key(cls, icon_def):
             parts = [icon_type, icon_def["path"]]
 
         elif icon_type in {"awesome-font", "material-symbols"}:
-            parts = [icon_type, icon_def["name"], icon_def["color"]]
+            color = icon_def["color"] or ""
+            if isinstance(color, QtGui.QColor):
+                color = color.name()
+            parts = [icon_type, icon_def["name"] or "", color]
         return "|".join(parts)
 
     @classmethod