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Screen: pixelDepth property - Web APIs | MDN
Screen: pixelDepth property Baseline Widely available
Returns the bit depth of the screen. Per the CSSOM, some implementations
return 24 for compatibility reasons. See the browser compatibility section for those that don't.
// if there is not adequate bit depth
// choose a simpler color
document.style.color = window.screen.pixelDepth > 8 ? "#FAEBD7" : "#FFFFFF";
