Dark Theme - or other options - via User Options or Workspace Options

Would it be possible to use some of the CSS to control the color of the (currently hard-coded as the elements are rendered) cells and other backgrounds using the settings for "Personal Colors and Logos.." and the workspace colors and logos dialogs?

I have a browser extension for css overrides which I use to reduce opacity and blend-modes of all the white backgrounds, but it really would be nice to have a fully "dark" theme available to use while tap tap tapping away late at night.

I'm guessing there are some companies which would like to embed smartsheet charts, data, forms, etc.. into their online presence, but the hard-coded entities' colors are preventing them from doing so.