Using this mod with the 1.17 branch of sodium crashes on startup (log).

I believe that this can be temporarily fixed by putting mixin.features.fast_biome_colors=false into .minecraft/config/sodium-mixins.properties and can be temporarily fixed on this mod's side by putting the following into src/main/resources/fabric.mod.json:

"custom": {
    "sodium:options": {
        "mixin.features.fast_biome_colors=false": false
    }
},

sodium 0.3.0 for 1.17 has now been released

There are currently no plans to develop Colormatic against unstable, unreleased Sodium builds.