diff --git a/packages/editor/src/toolbar/components/icon.tsx b/packages/editor/src/toolbar/components/icon.tsx
index d5ab84d95..61d347f2c 100644
--- a/packages/editor/src/toolbar/components/icon.tsx
+++ b/packages/editor/src/toolbar/components/icon.tsx
@@ -27,6 +27,7 @@ function isSchemeColor(
   color: string,
   theme: Theme
 ): color is keyof SchemeColors {
+  if (!theme || !theme.colors) return false;
   return color in theme.colors;
 }