Yes, it truly is cool: paean on the OS X color picker .

Bonus: Christopher Holland posted an OS X color list (.clr file) that you can just copy into the Library/Colors folder on your disk and it will update the colors palette with a new list: the entire list of "Resene" colours from X11. While that might seem lame on the face, it's a totally great list, with for example, the following shades of gold:

• gold drop
• gold tips
• golden bell
• golden dream
• golden fizz
• golden glow
• golden sand
• golden tainoi

What's more incredible - that they have 8 shades of gold or that someone gave them all different names? Anyway, he blogged his work or you can avoid the wacky CSS layout and download the .clr file directly .