diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index 4ef45b07..d75da8c3 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -34,4 +34,8 @@ interface PixelDiffRate {
   };
 }
 
-export { Config, Frames, ColorSchemes, PathConfig, PixelDiffRate };
+interface KeyColors {
+  [name: string]: string;
+}
+
+export { Config, Frames, ColorSchemes, PathConfig, PixelDiffRate, KeyColors };