Checking Correctness of Hex Color Code with PHP

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I needed to verify if the color value entered was hex or not. As a result of a little research, I verified with the following codes. I'm sharing it in case you need it one day.

$color = 'fa6582';
if (ctype_xdigit($color) && (strlen($color) == 6 || strlen($color) == 3)){
   echo 'valid hex color code';
} else {
   echo 'an invalid hex code';
}

good work

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