I am making a retro world that will be entirely black and white.

I have already made a grayscale texture pack

Due to Minecraft code, redstone, the sky, lilypads, spawners, and potion colors in the texture pack could not be changed.

Leaves, grass, ferns, and vines look colored in the inventory but are grayscale when placed down.

Other than that, the texture pack works just fine!

Get it here:
http://conspiracyrisk.weebly.com/blog/grayscale-152-minecraft-texture-pack

See ya!!