You can use 2Shapes in Rhino Interface, but also in 2Shapes UI. In 2Shapes UI, we have three modes: Light, Dark, and Custom.
In Custom, you can set the colors palettes as you want, and now we added the option to define also the background color. Before, the background color was the same as the ribbon.
It will be included in the next update.
If you have any questions, please let me know.
Thanks and best regards,
Rafael del Molino
2Shapes Technologies SLU