brand

var (
	ErrColors         = errors.New("brand: colors must use #RRGGBB")
	ErrFont           = errors.New("brand: invalid font")
	ErrWidth          = errors.New("brand: invalid page width")
	ErrTextContrast   = errors.New("brand: text needs at least 4.5:1 contrast against the background")
	ErrButtonContrast = errors.New("brand: choose a darker accent so white button labels remain readable")
)