Function withOpacity

withOpacity<T extends Hsl>(
value: T,
fn: (opacityScalar: number, value: T) => number,
): T
Scales the opacity value of an input HSL value
```
withOpacity()
```
Type Parameters
- T extends Hsl
Parameters
- value: T
  Colour
- fn: (opacityScalar: number, value: T) => number
  Function that calcules opacity based on input scalar value
Returns T
- Defined in visual/src/colour/hsl.ts:21