That mod kind-of exists separately, here 
It adds all the natural terrain colours for both the desert and forest biomes, so there should be some nice colour matches with the colours in this mod.
However, some of the brighter colours probably won’t match up as nicely; so it would be great if @Relyss and @BrunoSupremo could organise a crossover/add-on mod to add the new colours into the palette as well.
While that’s being done, it’s probably worth adding any new terrain colours from the Archipelago and Anorien biome mods in the same package, just to have all bases covered with a single “modded biomes terrain slabs all-in-one” mod – that should save end-users a little bit of time, and mean only one add-on to worry about keeping up to date with the biome mods themselves.
And if players happen to get biome colours from biomes they’re not using… well, honestly I don’t think that anyone is going to complain about that! 