Regular Expressions 101

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/
(?<style>[^\\]*)\\\\(?<color>[^\\]*)\\\\(?<size>[^$]*)
/
gix
Named Capture Group style
(?<style>[^\\]*)
Match a single character not present in the list below
[^\\]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case insensitive)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case insensitive)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case insensitive)
Named Capture Group color
(?<color>[^\\]*)
Match a single character not present in the list below
[^\\]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case insensitive)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case insensitive)
\\ matches the character \ with index 9210 (5C16 or 1348) literally (case insensitive)
Named Capture Group size
(?<size>[^$]*)
Match a single character not present in the list below
[^$]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
$ matches the character $ with index 3610 (2416 or 448) literally (case insensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])
x modifier: extended. Spaces and text after a # in the pattern are ignored
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
gix

Test String