---
title: slack.validateColorString() function
description: slack.validateColorString() ensures a string contains a valid hex color code.
url: https://docs.influxdata.com/flux/v0/stdlib/slack/validatecolorstring/
estimated_tokens: 420
product: Flux
version: v0
---

# slack.validateColorString() function

-   Flux 0.41.0+
-   View InfluxDB support

`slack.validateColorString()` ensures a string contains a valid hex color code.

##### Function type signature

```js
(color: string) => string
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### color

(Required) Hex color code.

## Examples

### Validate a hex color code string

```js
import "slack"

slack.validateColorString(color: "#fff")
```