# normalizeColorUnit

> Normalizes a regional color unit name to the canonical Hazen unit (uH). mg Pt-Co/L, PCU, TCU and Hazen are numerically equal. Returns undefined for unrecognized names.

> **normalizeColorUnit**(`unit`): `"uH"` \| `undefined`

Normalizes a regional color unit name to the canonical Hazen unit (`uH`).
mg Pt-Co/L, PCU, TCU and Hazen are numerically equal. Returns `undefined`
for unrecognized names.

## Parameters

### unit

`string`

## Returns

`"uH"` \| `undefined`