Is it possible to invert the color of UI elements?

I was wondering if anyone would know how to invert the color of a UI element as it passed over another element. Here is an example of what im talking about. Is it possible to say as the text is over the white box the color of that section of text is inverted? 86721-help.png

Google this: unity invert color

and you get this: https://forum.unity3d.com/threads/invert-colors-shader.205244/

Always ask google first. Ask Unity3d.com search second. Then come here if you’re still stuck. And go to the forums if no one gives you the answer you wanted ;p