diff --git a/src/vs/platform/theme/common/colorRegistry.ts b/src/vs/platform/theme/common/colorRegistry.ts
index a318f57ab1797959c4b931088caceb1721b99d68..a7ef107643a753b4fc3aea0c3500520090e8180f 100644
--- a/src/vs/platform/theme/common/colorRegistry.ts
+++ b/src/vs/platform/theme/common/colorRegistry.ts
@@ -90,7 +90,7 @@ class ColorRegistry implements IColorRegistry {
 
 	public resolveDefaultColor(id: ColorIdentifier, theme: ITheme): Color {
 		let colorDesc = this.colorsById[id];
-		if (colorDesc) {
+		if (colorDesc && colorDesc.defaults) {
 			let colorValue = colorDesc.defaults[theme.type];
 			return resolveColorValue(colorValue, theme);
 		}