[ @sdxc/u/responsive ]

contrastLess

Sugar over media("(prefers-contrast: less)", input).

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import { contrastLess } from "@sdxc/u/responsive";

Quick reference

Every documented call, beside the CSS it emits.

Call	CSS
`u.contrastLess(u.border("neutral"))`	`css({ "@media (prefers-contrast: less)": { borderColor: "var(--ui-neutral-border)" } })`

Examples

Basic example

Use contrastLess(...) to apply utilities when the reader asks for less contrast. Emulate prefers-contrast: less in your browser's dev tools to see the border soften:

Strong border

<div
	mix={[
		border({ color: "neutral.strong", width: 2 }),
		contrastLess(border("neutral")),
		...,
	]}
>
	Strong border
</div>

Applying on a state

Wrap the call in a state utility to scope it to one selector.

u.hover(u.contrastLess(u.border("neutral")))

Customizing your theme

Customizing colors

Define a palette as --ui-color-{name}-{50..950} and map a tone onto it with the --ui-{tone}-* variables, the way theme.css maps the built-in ones:

:root {
	--ui-color-info-50: oklch(0.97 0.02 230);
	--ui-color-info-200: oklch(0.88 0.06 230);
	--ui-color-info-500: oklch(0.62 0.16 230);
	--ui-color-info-600: oklch(0.52 0.18 230);
	--ui-color-info-900: oklch(0.3 0.1 230);

	--ui-info-bg-tint: var(--ui-color-info-50);
	--ui-info-bg-solid: var(--ui-color-info-600);
	--ui-info-fg: var(--ui-color-info-600);
	--ui-info-fg-muted: var(--ui-color-info-500);
	--ui-info-fg-emphasis: var(--ui-color-info-900);
	--ui-info-fg-on-solid: white;
	--ui-info-border: var(--ui-color-info-200);
	--ui-info-border-strong: var(--ui-color-info-600);
	--ui-info-ring: var(--ui-color-info-500);
}

declare module "@sdxc/u" {
	interface ColorPalettes {
		info: true;
	}
	interface SemanticTones {
		info: true;
	}
}

The new name is then accepted wherever the scale is:

bg("info")

Signature

u.contrastLess(input: UtilityInput<Node>)