If you want to make text better stand out against a background image, there’s a little trick: You can use a CSS linear-gradient overlay with a certain opacity on top of the image to improve color contrast.

How to determine the opacity to use for the overlay? The Optimal Overlay Finder helps you find out. You upload an image, enter your text and choose your overlay and text colors, and the tool shows you a preview of what the overlay looks like when applied to your image, as well as the optimal overlay opacity.

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