Other

Here the color of a fluid ingredient is determined with the fluid's FluidRenderHandler. Using the FluidVariantRenderHandler through FluidVariantRendering lets the fluid take NBT into account.

This appears correctly on Forge and with EMI:

FluidVariantRendering should also be used to provide default tooltips for fluids here.

Thanks for the report!
This should be fixed in the next release of JEI.