"grass.png" and "foliage.png" are powerful tools for texture artists to make the biomes into unique environments. However, the Swamp & Mesa biomes totally ignores these files and uses hardcoded colors, no matter what.

Additionally the "Roofed Forest" uses the colormaps, but multiples the color by a light green-grey, needlessly providing results that are off from the colormap.

The easiest way to test this is to take those two file (in any texture pack, in: assets/minecraft/textures/colormap/), and make them a solid color like red. You'll see all grass and all oak leaves effected except in swamps and mesas. Unless some other of the new biomes have hardcoded values-- haven't checked them all yet.

All biome coloring should instead be controlled entirely by the colormaps, as expected. A fix would be much appreciated.

Problem identified in the code.