A fellow gamedev was asking about Sega Mega Drive / Genesis color palettes. I've worked with Genesis limitations before, but a few searches didn't turn up much in the way of nicely laid out palettes, even less for the shadow and highlight modes the machine was capable of. Maybe my Google-Fu is just weak.
So, today I created a program to output the full color palette of the MD, and sort the colors by hue going left & right. The fully saturated colors are sorted by value going up towards black, and the less saturated are sorted by saturation going down. It's a dumb little program, but it's moderately better than picking from the RGB cube slices, IMO.
Also included are the same colors in RGB cube slices.
Note: I didn't group all the shadow and highlight colors into the the main color sort because these separate palettes typically can't be used together -- Scanline interrupts could change palettes, but it was too slow for real-time to do a full screen with lots of switching.
Note also that PNG images may have gamma correction applied depending on your editor, which can skew colors needlessly. Thus, if you want to pick colors, here's a TGA version