diff --git a/app/utils/to-electron-background-color.ts b/app/utils/to-electron-background-color.ts
index a758f5280255..dc50667b0769 100644
--- a/app/utils/to-electron-background-color.ts
+++ b/app/utils/to-electron-background-color.ts
@@ -12,7 +12,7 @@ const toElectronBackgroundColor = (bgColor: string) => {
   }
 
   // http://stackoverflow.com/a/11019879/1202488
-  const alphaHex = Math.round(color.alpha() * 255).toString(16);
+  const alphaHex = Math.round(color.alpha() * 255).toString(16).padStart(2, '0');
   return `#${alphaHex}${color.hex().toString().slice(1)}`;
 };