Colors, complementary, triadic

[Fudley 1]

Are there functions in Delphi to return complementary or triadic colors from a Talphacolor? I'm not even concerned about the alpha, so functions for Tcolor would work.

 

As always, thanks in advance!

[Der schöne Günther 310]

Wouldn't it be sufficient to convert a RGB color to HSL?

There is System.UIConsts.RGBtoHSL(..)

[Fudley 1]

Yes that's the first part. But that just gives you the same color in hsl. I need to be able to then find the complementary and triadic colors of this color.

[Der schöne Günther 310]

"Finding" the other colours is just adding 180° (complementary) or 120° (triads) on the hue value of your HSL colour.

 

Source: https://de.slideshare.net/slideshow/basic-color-theory-for-presentation-design-part-ii/53370835#44

Edited July 10 by Der schöne Günther

[Fudley 1]

Thanks for this! My issue was some confusion with the various functions expecting colors in the 0..1 range and I was using 0..360.

 

All sorted now, but I'm going to go read that reference material.

6 hours ago, Der schöne Günther said:

"Finding" the other colours is just adding 180° (complementary) or 120° (triads) on the hue value of your HSL colour.

 

Source: https://de.slideshare.net/slideshow/basic-color-theory-for-presentation-design-part-ii/53370835#44

 

[Rollo62 520]

Maybe you could vote for an extension of @Jim McKeeth nice ColorPicker here.

 

[Jim McKeeth 84]

My pallete library does complementary & triadic already. Still looking at expanding it.