Convert RGBA to just RGB but retain color in C#

Question

The below color is rgba(55, 103, 235, 0.53) on a white background. However is there code in c#/.NET that convert that to the actual rgb without opacity but retain the same color. The rgba is actually rgb(149, 174, 244) when I hover over it with a color picker.

Answer 1

I'm not sure if this works on any background color, but for your example, you can calucate the values like this:

value = backgroundValue - (backgroundValue - colorValue) * alphaValue
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r = 255 - (255 - 55)  * 0.53  = 149
g = 255 - (255 - 103) * 0.53 ~= 174
b = 255 - (255 - 235) * 0.53 ~= 244