Currently UXP in Premiere Pro doesn’t have UXP theme color CSS Variables the way that Photoshop does
Docs here: https://developer.adobe.com/photoshop/uxp/2022/guides/theme-awareness/
Examples:
var(--uxp-host-background-color)
var(--uxp-host-text-color)
A lot of tool migrations will depend on accessing these colors in some form.
In CEP we were able to access colors with JavaScript with:
JSON.parse(__adobe_cep__.getHostEnvironment()).appSkinInfo.panelBackgroundColor
Which in a lot of cases is easier to access than CSS vars. But we will need some sort of access eventually.
Thanks