Flip an image by analyzing the colors beneath it

Looking for a way to invert the color of specific areas under a mask (PNG) for a floating menu. Rather than inverting all at once, I want only certain parts to be inverted underneath the mask. Is this achievable, or is there another approach I should consider?

For instance, imagine half of the page is black and the other half is white. The image sits on top of these two halves. My goal is to invert the colors underneath the image so that it stands out.

After conducting a Google search, I was unable to find a solution to my query.

javascriptjquerycsshtml

Answer №1

The scenario you've described depicts an XNOR operation:

For instance:

Blue: #0000ff
Green: #008000

Result == Blue `xnor` Green
       == Blue ^ ~Green
       == #0000ff ^ #ff77ee
       == #ff77ee
       == Purple

Another example:

Yellow:   #ffff00
Purple: #800080

Result == Yellow `xnor` Purple
       == Yellow ^ ~Purple
       == #ffff00 ^ #7f007f
       == #7fff7f
       == Lime

Answer №2

A few months back, I had a similar task to accomplish for a website and let me tell you, it was quite challenging... If you visit , you might come across something that fits your needs, but be prepared to spend some time tweaking it to get it just right

This JavaScript code will convert your png into a canvas image, allowing you to potentially adjust the colors dynamically

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