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Regex for matching any hex, rgb(a), or hsl(a) value. Assumes that you've lowercased the string and removed spaces.
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/^(#?([a-f\d]{3,4}|[a-f\d]{6}|[a-f\d]{8})|rgb\((0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d)\)|rgba\((0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|0?\.\d|1(\.0)?)\)|hsl\((0|360|35\d|3[0-4]\d|[12]\d\d|0?\d?\d),(0|100|\d{1,2})%,(0|100|\d{1,2})%\)|hsla\((0|360|35\d|3[0-4]\d|[12]\d\d|0?\d?\d),(0|100|\d{1,2})%,(0|100|\d{1,2})%,(0?\.\d|1(\.0)?)\))$/ |
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/^#?([a-f\d]{3,4}|[a-f\d]{6}|[a-f\d]{8})$/ |
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/^hsl\((0|360|35\d|3[0-4]\d|[12]\d\d|0?\d?\d),(0|100|\d{1,2})%,(0|100|\d{1,2})%\)$/ |
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/^hsla\((0|360|35\d|3[0-4]\d|[12]\d\d|0?\d?\d),(0|100|\d{1,2})%,(0|100|\d{1,2})%,(0?\.\d|1(\.0)?)\)$/ |
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/^rgb\((0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d)\)$/ |
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/^rgba\((0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|255|25[0-4]|2[0-4]\d|1\d\d|0?\d?\d),(0|0?\.\d|1(\.0)?)\)$/ |
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You may want to consider putting
\s*
before number value groups in the RGB and HSL regexes so that you can capture formatted RGB strings likergb(100, 200, 90)
that may container spaces