I haven't tested this with all of them, but with certain skincolors there is an edge between the moving zigzag pattern and the text field in the character select screen in OpenGL, in Software mode it's all one continous shade. I've seen this edge appear with SKINCOLOR_SEAFOAM, SKINCOLOR_BEIGE, and SKINCOLOR_LILAC. Where characters are positioned in the selection list doesn't seem to matter.
Messing around with the ingame brightness setting shows the discrepancy on other colours:
SKINCOLOR_AQUA at max brightness
SKINCOLOR_SKY at one less than max brightness
SKINCOLOR_GOLD at two more than default brightness
Messing around with the ingame brightness setting shows the discrepancy on other colours:
SKINCOLOR_AQUA at max brightness
SKINCOLOR_SKY at one less than max brightness
SKINCOLOR_GOLD at two more than default brightness