# color/complement Rotate the hue 180° — the complementary color. Saturation, lightness and alpha are preserved. ## Syntax

[color/complement $color]

## Examples

[color/complement "#ff0000"]    # "#00ffff"
[color/complement "#89b4fa"]    # "#facf89"

## Returns `"#rrggbb"` hex string, or `"#rrggbbaa"` when the input is translucent. nil when the color is unparseable. ## See Also `color/rotate-hue`, `color/invert`