---
id: fast-colors.lightenvialab
title: lightenViaLAB() function
hide_title: true
---
<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[@microsoft/fast-colors](./fast-colors.md) &gt; [lightenViaLAB](./fast-colors.lightenvialab.md)

## lightenViaLAB() function

Lighten a color using LAB color space

<b>Signature:</b>

```typescript
export declare function lightenViaLAB(input: ColorRGBA64, amount: number, darkenConstant?: number): ColorRGBA64;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  input | [ColorRGBA64](./fast-colors.colorrgba64.md) |  |
|  amount | number |  |
|  darkenConstant | number |  |

<b>Returns:</b>

[ColorRGBA64](./fast-colors.colorrgba64.md)

## Remarks

The alpha channel of the input is ignored
