Extension of Tutorial 2 that lets you choose a color range to randomly recolor art. Just enter the hsb values for the two colors.
Also, you can choose to change the transparency or use only the active document's swatches.
Unfortunately, pattern swatches and color book swatches (like pantones) won't work. If anyone has any thoughts on how to fix that, let me know because I would love for them to work too.
Works great on large groups of shapes. Have fun!