reverse palettes
Two color palettes that are (approximatively) the exact reverse of each other, often used on matching outfits.
The palettes should be alternating, if they each have an independent theme color, they're not "reversed". But it might be color coordination instead. Compare Danbooru post #6313479 and Danbooru post #6313481.
Do not use this tag for color switch, palette swap or inverted colors.