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troubleshooting Question

How do I automatically set a foreground colour based upon a background colour?

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drunken_elf asked on
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I need a function that will automatically choose white or black text based upon a background colour, so its readable (white on yellow is not, for example). It is for a member profile option I am creating on a website, where users can choose a base colour for their profile and depending on that colour it will set white or black text.

Any help would be great, thanks.
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