fix: add ivy-green (#2920)

Author: dcrjodle

src/frontend/src/widgets/primitives/IvyLogoWidget.tsx

@@ -15,7 +15,7 @@ export const IvyLogoWidget: React.FC<IvyLogoWidgetProps> = ({
   const styles = {
     ...getWidth(width),
     ...getHeight(height),
-    ...getColor(color || "brand", "color", "background"),
+    ...getColor(color || "ivy-green", "color", "background"),
   };
 
   return <IvyLogo style={styles} className="text-brand" />;