Method visit_color

crates/csskit_transform/src/reduce_colors.rs:173–201

(&mut self, color: &Color)

	N: Visitable + NodeWithMetadata<CssMetadata>,
{
	fn visit_color(&mut self, color: &Color) {
		// color-mix() is handled by visit_color_mix_function
		if let Color::Function(colorfn) = color
			&& matches!(**colorfn, ColorFunction::ColorMix(_))
		{
			return;
		}
		let Some(chroma_color) = color.to_chromashift() else {
			return;
		};
		let len = color.to_span().len() as usize;

		if chroma_color.in_gamut_of(ColorSpace::Srgb)
			&& let Some(candidate) = chroma_color.shortest()
			&& candidate.len() < len
		{
			self.transformer.replace_parsed::<Color>(color.to_span(), &candidate);
			return;
		}

		// Try the native-space rounded form. This preserves the original colour space
		// while reducing precision to perceptually safe levels.
		let rounded = chroma_color.round();
		if let Some(css) = rounded.to_css()
			&& css.len() < len
		{
			self.transformer.replace_parsed::<Color>(color.to_span(), &css);
		}
	}

	fn visit_color_mix_function<'b>(&mut self, mix: &ColorMixFunction<'b>) -> VisitFlow {
		let outer_span = mix.to_span();