Slightly different, more cyan-tinted blue colors for Doom. These shades have appeared in various total conversions, often alongside altered red tones, but in this PWAD only the blue colors have been changed.
I honestly don't know who originally created this color set, but hopefully it won't be lost again!
To use, load the game with:
doom.exe -file bluepal.wad
…or drop it into any suitable autoload folder.
Chocolate-Doom examples (click to enlarge):