degree of transparency when semi-transparent elements overlap

Imagine you have two <div> elements, one with an opacity of .5 and another overlaying it with the same opacity. What would be the combined opacity of the two?
Interestingly, it's not as simple as,

  • .5 × .5

or even,

  • .5 + .5

How can this problem be calculated?

Answer №1

The correct equation you need is 1-(x multiplied by y)

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