# translucent

> A see-through background plus backdrop blur, gated behind `prefers-reduced-transparency: no-preference`; a reduced-transparency preference gets the opaque `--ui-bg` background and stays legible.

```ts
import { translucent } from "@sdxc/u/color";
```

A see-through background plus backdrop blur, gated behind
`prefers-reduced-transparency: no-preference`; a reduced-transparency
preference gets the opaque `--ui-bg` background and stays legible.

## Quick reference

Every documented call, beside the CSS it emits.

| Call | CSS |
| --- | --- |
| `u.translucent("sm")` | `css({ backgroundColor: "var(--ui-bg, Canvas)", "@media (prefers-reduced-transparency: no-preference)": { backgroundColor: "color-mix(in oklab, var(--ui-bg, Canvas) 70%, transparent)", "--ui-backdrop-blur": "var(--ui-blur-sm, 4px)", backdropFilter: "blur(var(--ui-backdrop-blur, 0px)) ..." } })` |

## Examples

### Basic example

Use `translucent()` for a panel that blurs what is behind it, falling back to a solid background when the reader prefers reduced transparency:

```tsx
<div mix={[p(8), ...]}>
	<div mix={[translucent(), ...]}>translucent()</div>
</div>
```

### Blur sizes

Pass a blur name, `sm`, `md` or `lg`, to set how strongly the backdrop is blurred:

```tsx
<div mix={[p(8), ...]}>
	<div mix={[translucent("sm"), ...]}>sm</div>
	<div mix={[translucent("md"), ...]}>md</div>
	<div mix={[translucent("lg"), ...]}>lg</div>
</div>
```

## Applying on a state

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

```ts
u.hover(u.translucent("sm"))
```

## Responsive design

Wrap the call in a container query to scope it to one width.

```ts
u.at("md", u.translucent("sm"))
```

## 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:

```css
: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);
}
```

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

The new name is then accepted wherever the scale is:

```ts
bg("info")
```

### Customizing blur

Redefine a `--ui-blur-*` variable to change a step, or declare a new one:

```css
:root {
	--ui-blur-xl: 24px;
}
```

```ts
declare module "@sdxc/u" {
	interface Blurs {
		xl: true;
	}
}
```

The new name is then accepted wherever the scale is:

```ts
translucent("xl")
```

## Signature

```ts
u.translucent(name?: BlurName | (string & {}))
```