As @Rami asked the question and my answer generate more questions for @Mythmaker, and as I don’t want to pollute more the original topic Color Exercise - Crit Wanted, I create a dedicated topic to provide answer to questions about Shade selector.
Please note: this is my own comprehension of the system, documentation is a little bit light and maybe I’m wrong; don’t hesitate to complete/fix my explanation if needed.
You can see the HSV model as a cylinder, this example is easy to understand:
(original wikipedia link: HSV_color_solid_cylinder_saturation_gray.png)
So, in Krita, basically you have:
- The value bar, allowing to choose variation for current color to black (purple arrow on my screenshot)
- The color wheel, allowing to choose color hue (sand arrow) & saturation (green arrow)
But, choosing in the color wheel is not really precise: modifying the saturation without changing hue or modifying hue without modifying saturation, it’s practically impossible.
This is why you have the shade selectors: it allows you to define a reduced range of colors around the current color, in the 3 directions (a sort of cube of colors)
For this, you have 6 values:
- Delta Hue = Hue range around the color
- Delta Saturation = Saturation range around the color (negative value: applied on right side of base color, positive value: applied on left side of base color)
- Delta Value = Value range around the color (negative value: applied on right side of base color, positive value: applied on left side of base color)
- Shift Hue = offset applied to current color in hue
- Shift Saturation = offset applied to current color in saturation
- Shift Value = offset applied to current color in value
Create a color selector shifted from 50% from current color, with a range of +/-50%
(I suppose that 0.5 means 50% )
Playing with all this parameters, you can ‘easily’ build your own color selector.
For example, here I’ve created:
- 2 colors selector to get corresponding colors at 120° in hue wheel
- 1 colors selector to get a de-saturated variation (left side) and a darker variation (right side) of current color
From the Red: I get Green & Blue
From the Yellow: I get Magenta & Cyan
Hope my explanation are clear and answers the original questions