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Even more important to consider: how bad the typical advice is, due to rampant misunderstanding of "colorblindness".

I've found Vischeck to be helpful: http://www.vischeck.com/vischeck/

What do you think of ReColor for that? http://animesh.co/portfolio/recolor/

Unfortunately, it's still unavailable. Though, as a red-greed colourblind person, it seems really interesting.

Colorblindness isn't a uniform condition. Best practice is to utilize multiple signifiers (hue, lightness/darkness, iconography, etc)

so long as the accent color is differentiated by lightness/darkness in addition to hue it will be fine.