Ah. I misunderstood you... you want to quickly create palettes for print and web work.
In that case, can I suggest not using anything screen-based? Instead a handy little book called
Colour Index or something similar is far more useful to see combinations and CMYK colours as they would appear on page, not on screen.
Colour Index
It's a complete bargain and gets used almost every day in our studio to kickstart colour thinking.
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.