Change HSL Color values

Jason Storey

The ColorHSL struct contains a constructor to create an instance of the ColorHSL struct based on a provided hue, saturation, and lightness values. The ColorHSL struct also has a ToString method that returns the hue, saturation, and lightness values as a string.

public static class ColorExtensions
{
  public static Color WithHue(this Color rgb,float hue) =>
  ColorHSL.From(rgb).WithHue(hue);

  public static Color WithRandomHue(this Color c, float min = 0, float max = 1) =>
  c.WithHue(Mathf.Lerp(min, max, Random.value));

  public static Color WithSaturation(this Color c, float saturation) =>
  ColorHSL.From(c).WithSaturation(saturation);

  public static Color WithRandomSaturation(this Color c, float min = 0, float max = 1) =>
  c.WithSaturation(Mathf.Lerp(min, max, Random.value));

  public static Color WithLightness(this Color c,float value)=>
  ColorHSL.From(c).WithLightness(value);

  public static Color WithRandomLightness(this Color c, float min = 0, float max = 1) =>
  c.WithLightness(Mathf.Lerp(min, max, Random.value));

  public static Color WithAlpha(this Color c, float a) => new(c.r, c.g, c.b, a);
}

[Serializable]

public struct ColorHSL
{
  public static ColorHSL From(float r, float g, float b) => new Color(r, g, b);
  public static ColorHSL From(Color c) => c;
  
  public static readonly ColorHSL White = new(0, 0, 1);
  public static readonly ColorHSL Black = new(0, 0, 0);
  
  public readonly float Hue;
  public readonly float Saturation;
  public readonly float Lightness;
  
  public static implicit operator Color(ColorHSL hsl) => Color.HSVToRGB(hsl.Hue, hsl.Saturation, hsl.Lightness);
  
  public static implicit operator ColorHSL(Color col)
  {
    Color.RGBToHSV(col,out var h,out var s,out var l);
    return new ColorHSL(h, s, l);
  }
  
  public ColorHSL(float h,float s,float l)
  {
  Hue = Mathf.Clamp01(h);
  Saturation = Mathf.Clamp01(s);
  Lightness = Mathf.Clamp01(l);
  }

  public ColorHSL Inverted() => new(Hue + 0.5f, 0, 1 - Lightness);
  public ColorHSL WithInvertedLuminance() => new ColorHSL(Hue, Saturation, 1 - Lightness);
  public ColorHSL WithInvertSaturation() => new ColorHSL(Hue, 1 - Saturation, Lightness);
  public ColorHSL WithHue(float hue) => new(hue, Saturation, Lightness);
  public ColorHSL WithSaturation(float saturation) => new(Hue, saturation, Lightness);
  public ColorHSL WithLightness(float lightness) => new(Hue, Saturation, lightness);
  
  public override string ToString() => string.Format("[h: {0}, s: {1}, l: {2}]", Hue, Saturation, Lightness);
}