I have made a new texture pack called Dread. All the information is inside in the readme.txt.

The main idea is to blend/smudge the colors of the blocks. I also borrowed a few blocks, credits in the readme.
I even added extra blocks included with the download. You can use these to replace the other blocks in the terrain.png if you want.

I also replaced the dirt.png with my "dread" block, which is in the extra tiles folder, and included as a picture here (for now).

Plus, I replaced carpet with dirt since I figured almost nobody uses it.

Files: 

Dread.zip