You can have an HTML element with conditions (when Current User´s color is Red) and change the HTML. Insert this code, and change the color to whatever you need:
<style>
.slideable-menu {
background: red !important;
}
</style>
Here is a GIF showing how it works:
Also, I don´t think that it is @Bubble ´s priority, but we need more design capabilities for sure
