like the others said, r3f handles color management automatically. every color, texture, etc is converted according to Color management in three.js
this is one of the few places where react deviates from vanilla three defaults, but you can completely disable it:
<Canvas linear>
but i would recommend not doing that. just like don’s article above states, incorrect gamma is the #1 culprit for that old, plasticky cgi look with blown out highs and lows, eye popping colors. most applications (photoshop, blender, etc) use srgb.