I always disable it. Having everything using the same exact colour palette is boring/homogenized. The themed icons are even worse, simultaneously killing iconography art and making it much more difficult to differentiate between apps in the app drawer quickly.
I love the consistent colors across my system. A very welcome change to me, personally.
Okay explain why a contact’s icon color is different between stock messaging and phone apps on a pixel 8.
That might be a bug or an oversight, but I don’t feel like I need to explain this in order to maintain my stance on/preference for the unified colors. I like it, period. If there are bugs, I hope they get fixed. 🤷♂️
I don’t think they are different? Here’s what the phone, messaging, and contacts app icons look like on my pixel 8.
Edit: I’m a dummy. I just realized you meant the contacts’ icons in each of those apps. I just confirmed those colors can vary between each app. I agree, that does seem like an oversight.