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Asked: 2026-05-12T20:55:01+00:00

I have a color A that I’d like to transform into color C, by

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I have a color A that I’d like to transform into color C, by using color B. So I’d like to know the blending formula F in GDI+, where F = F(A, B) = C. A is the “bottom color” and B is an overlay color above A, which together with A yields C.

Cheers,

// Magnus

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1 Answer

  1. Editorial Team

    This is called Alpha Blending.

    Use the following algorithm for the R, G, and B components, where alpha is between 0 and 1.

    newColor = MAX(255, (1 - alpha) * background + alpha * overlay)
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