import magicalrainbows.formats : RGB888; assert(RGB888(0, 0, 0).complementary == RGB888(255, 255, 255)); assert(RGB888(255, 255, 255).complementary == RGB888(0, 0, 0)); assert(RGB888(0, 255, 255).complementary == RGB888(255, 0, 0)); assert(RGB888(0, 128, 0).complementary == RGB888(255, 127, 255));