diff --git a/packages/core/color/color-common.ts b/packages/core/color/color-common.ts
index ea584b0da..3a32fe3c9 100644
--- a/packages/core/color/color-common.ts
+++ b/packages/core/color/color-common.ts
@@ -69,12 +69,11 @@ export class Color implements definition.Color {
 	}
 
 	get hex(): string {
-		if (this.a === 0xff) {
-			return SHARP + ((1 << 24) + (this.r << 16) + (this.g << 8) + this.b).toString(16).slice(1);
-		} else {
-			const hex = this._argb.toString(16);
-			return SHARP + hex.slice(2) + hex.slice(0, 2);
+		let result = SHARP + ('000000' + (this._argb & 0xFFFFFF).toString(16)).slice(-6);
+		if (this.a !== 0xff) {
+			return result += ('00' + (this.a).toString(16)).slice(-2);
 		}
+		return result;
 	}
 
 	get name(): string {