SCREEN

B(cb,cs) = 1 – [(1–cb)×(1–cs)] = cb + cs – (cb × cs) Multiplies the complements of the backdrop and source colour values, then complements the result. The result colour is always at least as light as either of the two constituent colours. Screening any colour with white produces white; screening with black leaves the original colour unchanged. The effect is similar to projecting multiple photographic slides simultaneously onto a single screen.

See also PorterDuff.Mode#SCREEN