Regex Cheatsheet - Regular Expression Quick Reference
Quick reference for regular expression patterns. Character classes, quantifiers, anchors, and common patterns.
Hex Color Pattern
Common PatternMatch CSS hex color (#RGB, #RRGGBB, #RRGGBBAA)
Pattern
^#([0-9A-Fa-f]{3}|[0-9A-Fa-f]{6}|[0-9A-Fa-f]{8})$Examples
#FFFShort white
Matches: #FFF
#FF5733Standard 6-digit
Matches: #FF5733
#FF5733AAWith alpha
Matches: #FF5733AA
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