WPF Color interpolation

Question

I am trying to paint a WPF control\'s background based on a palette where each color has been assigned with values (e.g. Red = 0, DarkGreen = 10, Green = 20,LightGreen =30)

Answer 1

Where did you come up with the Values 10/20/30 for your DarkGreen/Green/Lightgreen colors.

You'll need some sort of correlation table between your assigned palette values & the real numeric representations of the colors... e.g.

Color             Pal-Code     RGB            HSL
Red               0            255,0,0        0,240,120
Dark Green        10           0,128,0        80,240,60
Green             20           0,255,0        80,240,120
Light Green       30           128,255,128    80,240,180

From that correlation table, you could take any user "palette code", find the closed matching pair of palette codes from the table above and do a best-match range find on it. e.g. if some entered 25 (let's use HSL for convenience) then the formula would be...

Green             20           0,255,0        80,240,120
Light Green       30           128,255,128    80,240,180

25 is halfway between both codes so

Palette Code     Hue        Sat      Luminence
20               80         240      120
30               80         240      180
-------------------------------------------------
25               80         240      150 

If they had selected 6, you'd need to find .6 of the range of colors between each value.

Red               0            255,0,0        0,240,120
Dark Green        10           0,128,0        80,240,60

Palette Code     Hue        Sat      Luminence
0                0          240      120
10               80         240      60
-------------------------------------------------
6                48         240      84

0->80      = +80 * 60%   = +48    So 0+48   = 48
240->240   =   0 * 60%   = 0      So 240+0  = 240
120->60    = -60 * 60%   = -36    So 120-36 = 84