---
title: "Oklab"
description: "A colour in OKLab."
url: "https://opsinjs.pensievelabs.org/reference/api/Oklab"
source: "https://opsinjs.pensievelabs.org/reference/api/Oklab.md"
section: "Reference"
kind: "reference"
---

> Elements written as `<PascalCase … />` below are opsinjs documentation
> components. Their attributes are the content: the values they render are
> generated from `tokens/*.json` and `registry/catalogue.ts` and are
> published separately at https://opsinjs.pensievelabs.org/r/index.json and under the Reference
> section.
> Nothing is missing from this page. The data simply does not live in
> the prose.

{/* GENERATED - do not edit. Source: the declaration named in the table below.
    Script: scripts/build-reference.mts. Change the doc comment on the symbol. */}

<PageTemplate kind="reference" />

## How this is generated [#how-this-is-generated]

Source: `lib/color/oklch.ts`. Script: `scripts/build-reference.mts`. Command:
`pnpm run generate`.

Everything below is copied from the symbol, so a page is improved by improving
its doc comment. The [API index](./index.mdx) says why there is a page per
symbol and what these pages still do not carry.

{/* opsinjs:generated:begin - everything below is replaced by scripts/build-reference.mts */}

## Oklab [#oklab]

A colour in OKLab.

| Kind      | Declared in          |
| --------- | -------------------- |
| interface | `lib/color/oklch.ts` |

```ts
export interface Oklab {
  l: number
  a: number
  b: number
  alpha?: number
}
```

{/* opsinjs:generated:end */}