Change widget color of Donut in Modern Dashboard
As far as I'm aware you can't. I've asked this question before.
If you put on 3d glasses, or rose colored sunglasses, it changes them!! 😏
Not sure if this is new in 2026.1, but here you can set your own colors of the "blocks" in the donat bar.
I have for the "Color mapping" field, a hex value for the color I want. I get them here from color column in Orion.StatusInfo