HSX

Krita has four different HSX coordinate systems. The difference between them is how they handle tone.

HSI

HSI is a color coordinate system, using Hue, Saturation and Intensity to catagorise a color. Hue is roughly the wavelength, whether the colour is red, yellow, green, cyan, blue or purple. It is measure in 360°, with 0 being red. Saturation is the measurement of how close a color is to grey. Intensity, in this case is the tone of the color. What makes intensity special is that it recognises Yellow(rgb:1,1,0) having a higher combined rgb value than blue(rgb:0,0,1). This is a non-linear tone dimension, which means it’s gamma-corrected.

HSL

HSL is also a color coordinate system. It describes colors in Hue, Saturation and Lightness. Lightness specifically puts both yellow(rgb:1,1,0), blue(rgb:0,0,1) and middle grey(rgb:0.5,0.5,0.5) at the same lightness(0.5).

HSV

HSV, occasionally called HSB, is a color coordinate system. It measures colors in Hue, Saturation, and Value(also called Brightness). Value or Brightness specifically refers to strength at which the pixel-lights on your monitor have to shine. It sets Yellow(rgb:1,1,0), Blue(rgb:0,0,1) and White(rgb:1,1,0) at the same Value(100%)

HSY

HSY is a color coordinate system. It catagorises colors in Hue, Saturation and Luminosity. Well, not really, it uses Luma instead of true luminosity, the difference being that Luminosity is linear while Luma is gamma-corrected and just weights the rgb components. Luma is based on scientific studies of how much light a color reflects in real-life. While like intensity it acknowledges that Yellow(rgb:1,1,0) is lighter than blue(rgb:0,0,1), it also acknowledges that Yellow(rgb:1,1,0) is lighter than Cyan(rgb(0,1,1), based on these studies.

HSX Blending Modes

Color, HSV, HSI, HSL, HSY

This takes the Luminosity/Value/Intensity/Lightness of the colours on the lower layer, and combines them with the Saturation and Hue of the upper pixels. We refer to Color HSY as ‘Color’ in line with other applications.

../../_images/Blending_modes_Color_HSI_Gray_0.4_and_Gray_0.5.png

Left: Normal. Right: Color HSI.

../../_images/Blending_modes_Color_HSI_Light_blue_and_Orange.png

Left: Normal. Right: Color HSI.

../../_images/Blending_modes_Color_HSI_Sample_image_with_dots.png

Left: Normal. Right: Color HSI.

../../_images/Blending_modes_Color_HSL_Sample_image_with_dots.png

Left: Normal. Right: Color HSL.

../../_images/Blending_modes_Color_HSV_Sample_image_with_dots.png

Left: Normal. Right: Color HSV.

../../_images/Blending_modes_Color_Sample_image_with_dots.png

Left: Normal. Right: Color.

Hue HSV, HSI, HSL, HSY

Takes the saturation and tone of the lower layer and combines them with the hue of the upper-layer. Tone in this case being either Value, Lightness, Intensity or Luminosity.

../../_images/Blending_modes_Hue_HSI_Sample_image_with_dots.png

Left: Normal. Right: Hue HSI.

../../_images/Blending_modes_Hue_HSL_Sample_image_with_dots.png

Left: Normal. Right: Hue HSL.

../../_images/Blending_modes_Hue_HSV_Sample_image_with_dots.png

Left: Normal. Right: Hue HSV.

../../_images/Blending_modes_Hue_Sample_image_with_dots.png

Left: Normal. Right: Hue.

Increase Value, Lightness, Intensity or Luminosity.

Similar to lighten, but specific to tone. Checks whether the upper layer’s pixel has a higher tone than the lower layer’s pixel. If so, the intensity is increased, if not, the lower layer’s tone is maintained.

../../_images/Blending_modes_Increase_Intensity_Sample_image_with_dots.png

Left: Normal. Right: Increase Intensity.

../../_images/Blending_modes_Increase_Lightness_Sample_image_with_dots.png

Left: Normal. Right: Increase Lightness.

../../_images/Blending_modes_Increase_Value_Sample_image_with_dots.png

Left: Normal. Right: Increase Value.

../../_images/Blending_modes_Increase_Luminosity_Sample_image_with_dots.png

Left: Normal. Right: Increase Luminosity.

Increase Saturation HSI, HSV, HSL, HSY

Similar to lighten, but specific to Saturation. Checks whether the upper layer’s pixel has a higher Saturation than the lower layer’s pixel. If so, the Saturation is increased, if not, the lower layer’s Saturation is maintained.

../../_images/Blending_modes_Increase_Saturation_HSI_Sample_image_with_dots.png

Left: Normal. Right: Increase Saturation HSI.

../../_images/Blending_modes_Increase_Saturation_HSL_Sample_image_with_dots.png

Left: Normal. Right: Increase Saturation HSL.

../../_images/Blending_modes_Increase_Saturation_HSV_Sample_image_with_dots.png

Left: Normal. Right: Increase Saturation HSV.

../../_images/Blending_modes_Increase_Saturation_Sample_image_with_dots.png

Left: Normal. Right: Increase Saturation.

Intensity

Takes the Hue and Saturation of the Lower layer and outputs them with the intensity of the upper layer.

../../_images/Blending_modes_Intensity_Sample_image_with_dots.png

Left: Normal. Right: Intensity.

Value

Takes the Hue and Saturation of the Lower layer and outputs them with the Value of the upper layer.

../../_images/Blending_modes_Value_Sample_image_with_dots.png

Left: Normal. Right: Value.

Lightness

Takes the Hue and Saturation of the Lower layer and outputs them with the Lightness of the upper layer.

../../_images/Blending_modes_Lightness_Sample_image_with_dots.png

Left: Normal. Right: Lightness.

Luminosity

As explained above, actually Luma, but called this way as it’s in line with the terminology in other applications. Takes the Hue and Saturation of the Lower layer and outputs them with the Luminosity of the upper layer. The most preferred one of the four Tone blending modes, as this one gives fairly intuitive results for the Tone of a hue

../../_images/Blending_modes_Luminosity_Sample_image_with_dots.png

Left: Normal. Right: Luminosity.

Saturation HSI, HSV, HSL, HSY

Takes the Intensity and Hue of the lower layer, and outputs them with the HSI saturation of the upper layer.

../../_images/Blending_modes_Saturation_HSI_Sample_image_with_dots.png

Left: Normal. Right: Saturation HSI.

../../_images/Blending_modes_Saturation_HSL_Sample_image_with_dots.png

Left: Normal. Right: Saturation HSL.

../../_images/Blending_modes_Saturation_HSV_Sample_image_with_dots.png

Left: Normal. Right: Saturation HSV.

../../_images/Blending_modes_Saturation_Sample_image_with_dots.png

Left: Normal. Right: Saturation.

Decrease Value, Lightness, Intensity or Luminosity

Similar to darken, but specific to tone. Checks whether the upper layer’s pixel has a lower tone than the lower layer’s pixel. If so, the tone is decreased, if not, the lower layer’s tone is maintained.

../../_images/Blending_modes_Decrease_Intensity_Gray_0.4_and_Gray_0.5.png

Left: Normal. Right: Decrease Intensity.

../../_images/Blending_modes_Decrease_Intensity_Light_blue_and_Orange.png

Left: Normal. Right: Decrease Intensity.

../../_images/Blending_modes_Decrease_Intensity_Sample_image_with_dots.png

Left: Normal. Right: Decrease Intensity.

../../_images/Blending_modes_Decrease_Lightness_Sample_image_with_dots.png

Left: Normal. Right: Decrease Lightness.

../../_images/Blending_modes_Decrease_Value_Sample_image_with_dots.png

Left: Normal. Right: Decrease Value.

../../_images/Blending_modes_Decrease_Luminosity_Sample_image_with_dots.png

Left: Normal. Right: Decrease Luminosity.

Decrease Saturation HSI, HSV, HSL, HSY

Similar to darken, but specific to Saturation. Checks whether the upper layer’s pixel has a lower Saturation than the lower layer’s pixel. If so, the Saturation is decreased, if not, the lower layer’s Saturation is maintained.

../../_images/Blending_modes_Decrease_Saturation_HSI_Gray_0.4_and_Gray_0.5.png

Left: Normal. Right: Decrease Saturation HSI.

../../_images/Blending_modes_Decrease_Saturation_HSI_Light_blue_and_Orange.png

Left: Normal. Right: Decrease Saturation HSI.

../../_images/Blending_modes_Decrease_Saturation_HSI_Sample_image_with_dots.png

Left: Normal. Right: Decrease Saturation HSI.

../../_images/Blending_modes_Decrease_Saturation_HSL_Sample_image_with_dots.png

Left: Normal. Right: Decrease Saturation HSL.

../../_images/Blending_modes_Decrease_Saturation_HSV_Sample_image_with_dots.png

Left: Normal. Right: Decrease Saturation HSV.

../../_images/Blending_modes_Decrease_Saturation_Sample_image_with_dots.png

Left: Normal. Right: Decrease Saturation.