SteamOS 3.5.5 has been released to the Stable channel for Deck with the following changes: Display The default color rendering for Steam Deck LCD has been adjusted to emulate the sRGB color gamut, resulting in a slightly warmer and more vibrant color appearance. Added Settings -> Adjust Display Colors, to tune the display's Color Vibrancy and Color Temperature. The settings can be tuned with a preview of a test image (above), or with your running game.
Beware microphone users, this update broke the mic. So if you like playing with friends over discord, might want to hold off on updating.
Yeah, audio in general seems to be a bit bugged. I’ve had issues with apps and games not actually using the default output/sink. Thankfully, the output they are choosing is the one I use most of the time, but it’s annoying when that’s not the case.