Design without color isn't just useful for the color blind it helps a designer get a better handle over visual noise. For this reason I operate under grey scale

Design without color isn't just useful for the color blind it helps a designer get a better handle over visual noise. For this reason I operate under grey scale by default on my machine, and only have the option to turn it off for 5 minutes at a time (see https://github.com/cyphunk/grey https://github.com/cyphunk/grey)