For most graphics programs in the Adobe suite the operating system’s color picker goes unused. Flash, still holding on to a lot of its Macromedia-isms still has a button to pick colors in this old fashioned way. Normally, particularly on windows, this would be a bad thing. But oh, what’s this? That ugly color spectrum can be replaced with another image?!
Yep. That’s pretty cool, and I can already think of a few (im)practical uses! I’d be interested in seeing anyone else trying this. Attach a screenshot with Command+Shift+4