stylesheet(s): sync accent color with upstream

[Muqtxdir]

Hi,

It's been a few releases, since upstream(libadwaita) has allowed switching between diff accent colors. We should evaluate the current build process and consider using the upstream color palette with the exception of orange (ubuntu orange branding color). This will also help in reducing the delta between upstream in regards to design.

Although, it's pretty late to start now given the next release is closer - better to target 25.10

[Feichtmeier]

I would prefer this too as this is a low hanging fruit regarding maintenance simplification and improving the life of app developers creating gtk apps

[jbicha]

I think Marco really likes the Ubuntu color choices. Maybe someone could try to argue for them upstream.

[tanshkoul]

Hi folks -- Just following up, if the previous issue I raised could be addressed along this one as well (#4093). Let me know if I can be of help here. Cheers!

[jbicha]

@tanshkoul Please do not leave unrelated comments on other issues. It is off topic.