Function generateScalar

generateScalar(
    absoluteHslOrVariable: string | number | Angle,
    saturation?: number,
    lightness?: number,
    opacity?: number,
): HslScalar
Generates a HslScalar value.
```
generateScaler(10); // 10deg, default to full saturation, half lightness and full opacity

// Generate HSL value from radian angle and 50% saturation
generateScalar(`10rad`, 0.5); 

// Generate from numeric CSS variable
generateScalar(`--hue`);
```
Parameters
- absoluteHslOrVariable: string | number | Angle
  Hue angle or CSS variable
- saturation: number = 1
- lightness: number = 0.5
- opacity: number = 1
Returns HslScalar
- Defined in visual/src/colour/hsl.ts:245