i see the selected color in the menu, the watch vibrates when i change it, but the display does not update.
Maybe try Settings->Utils->rewrite settings and see if that helps.
Settings->Utils->rewrite settings
If you were on pre-2v12 before then this could occur, and while 2v12 fixed it, if it has happened before you'd have to 'rewrite settings' to fix it
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Maybe try
Settings->Utils->rewrite settings
and see if that helps.If you were on pre-2v12 before then this could occur, and while 2v12 fixed it, if it has happened before you'd have to 'rewrite settings' to fix it