I worked on a project that did something fun with SVGs like this. It was built with React, and we had a series of still illustrations with an animated element, with its colour controlled by a CMS.
The frontend would basically call an API that would return an SVG image with the right colour assigned and the animation done by hiding and showing svg elements.
You can see an example here: https://web.archive.org/web/20221020133516im_/https://uncrow...
