Class Hct

java.lang.Object
org.pushingpixels.ephemeral.chroma.hct.Hct
public final class Hct extends Object
HCT, hue, chroma, and tone. A color system that provides a perceptually accurate color measurement system that can also accurately render what colors will appear as in different lighting environments.

  • Field Details

    • hue

      private double hue

    • chroma

      private double chroma

    • tone

      private double tone

    • argb

      private int argb

  • Constructor Details

    • Hct

      private Hct(int argb)

  • Method Details

    • from

      public static Hct from(double hue, double chroma, double tone)
      Create an HCT color from hue, chroma, and tone.
      Parameters:
      hue - 0 <= hue < 360; invalid values are corrected.
      chroma - 0 <= chroma < ?; Informally, colorfulness. The color returned may be lower than the requested chroma. Chroma has a different maximum for any given hue and tone.
      tone - 0 <= tone <= 100; invalid values are corrected.
      Returns:
      HCT representation of a color in default viewing conditions.

    • fromInt

      public static Hct fromInt(int argb)
      Create an HCT color from a color.
      Parameters:
      argb - ARGB representation of a color.
      Returns:
      HCT representation of a color in default viewing conditions

    • getHue

      public double getHue()

    • getChroma

      public double getChroma()

    • getTone

      public double getTone()

    • toInt

      public int toInt()

    • setHue

      public void setHue(double newHue)
      Set the hue of this color. Chroma may decrease because chroma has a different maximum for any given hue and tone.
      Parameters:
      newHue - 0 <= newHue < 360; invalid values are corrected.

    • setChroma

      public void setChroma(double newChroma)
      Set the chroma of this color. Chroma may decrease because chroma has a different maximum for any given hue and tone.
      Parameters:
      newChroma - 0 <= newChroma < ?

    • setTone

      public void setTone(double newTone)
      Set the tone of this color. Chroma may decrease because chroma has a different maximum for any given hue and tone.
      Parameters:
      newTone - 0 <= newTone <= 100; invalid valids are corrected.

    • isBlue

      public static boolean isBlue(double hue)

    • isYellow

      public static boolean isYellow(double hue)

    • isCyan

      public static boolean isCyan(double hue)

    • inViewingConditions

      public Hct inViewingConditions(ViewingConditions vc)
      Translate a color into different ViewingConditions.

      Colors change appearance. They look different with lights on versus off, the same color, as in hex code, on white looks different when on black. This is called color relativity, most famously explicated by Josef Albers in Interaction of Color.

      In color science, color appearance models can account for this and calculate the appearance of a color in different settings. HCT is based on CAM16, a color appearance model, and uses it to make these calculations.

      See ViewingConditions.make for parameters affecting color appearance.

    • setInternalState

      private void setInternalState(int argb)