Today was introduced "breaking" change to nightly build.
Up to this point every solder armor was always recolored (face & hair) by game, now its require rule change to enable this.
If you want maintain current behavior you should add this lines to any armor used by solders and showing skin:
spriteFaceGroup: 6
spriteFaceColor: [96, 96, 96, 96, 160, 160, 163, 163] #M0 F0 M1 F1 M2 F2 M3 F3
spriteHairGroup: 9
spriteHairColor: [144, 144, 164, 164, 245, 245, 166, 166] #M0 F0 M1 F1 M2 F2 M3 F3
Where group is index range of color form palette, e.g. 6 give range form 96 to 111, all pixel with that colors will be replace by new values.
Game extract shade part of that pixel and add value form color array based on race & gender, result value is displayed in place of original pixel.
One new feature is that code is enabled for aliens and civilians too, but position in table is choose at random when unit is created.
I hope it will be useful.