In an amazingly sassily titled update, Valve has fixed the color saturation and fan control problems introduced by The OLED Update yesterday.

https://www.steamdeck.com/en/news

NOV 14, 2023

SteamOS 3.5.3 Preview: The LCD Update

Note: This update is for the Steam Deck Preview channel, and includes new features that are still being tested. You can opt into this in Settings > System > System Update Channel.

• Fixed a regression with color management sliders
• Fixed a fan control regression