How can I change the water colormap in Minecraft 1.13 with a resource pack?

31-Dec-2022

How can I change the water colormap in Minecraft 1.13 with a resource pack?

So the Aquatic update changed the colors of water, and many biomes have their own tint in the water. The changes are somewhat different on Bedrock vs Java however, and I prefer the Bedrock version of the colormap (as well as the colors of the underwater fog), such as the richer looking cold biome water, and the very opaque swamp water.

So I'd like to change the colors for Java to be like on Bedrock, but I don't know how to do this. Can anyone help me? I know I'll almost certainly need Optifine, because the colors are sort of coded in rather than available to modify just with the textures as far as I know, but beyond that I have no idea what to do.