Button group colours stopped working?

I'm pretty sure that the custom colour option for button groups used to work, I even posted a screen capture in a forum post

But now I can't get it to work on dashboard MKII v1.16 or 1.18

These options

result in this
image

Can you raise an issue with small flow that demonstrates this please.

If it turns out to be a bug, I will make sure we add automated "End to End" tests to prevent further regression.

OK well after going a bit deeper into this (ie actually clicking on a button) I see that once clicked, a button in the group acquires class v-btn--active and the background color specified in the config.

So all buttons are white until one of them is clicked, then it, in radio button style, gets coloured.

It's clearly not a bug but a design choice.

Thanks @Steve-Mcl