Shades
A nice little add-on for the Macintosh that works nicely with Tinderbox is Shades, It's a color picker; it supplements the color wheel and sliders that normally appear in your system color picker. Instead of asking you to choose one color, it shows you a color and a systematic set of variants.
I've been cleaning up my desk and my desktop, updating software and making sure everything runs well. This is one example of a nice little utility than can improve your virtual work space, quickly and easily.
It's free to try, and costs only $18.