negative property
Red negative color.
Defaults to ZetaColors.red.60
in AA system.
Defaults to ZetaColors.red.80
in AAA system.
Maps to ColorScheme.error.
Color swatches are inverted if ZetaColors.brightness is Dark.
When changing from AA to AAA, the color will increase by 2 stops on the swatch.
Implementation
Color get negative => red;