regex101: PCRE (Legacy) Match Workspace

Pro

^start of line

#the literal # (35₁₀ / 43₈ / 23₁₆)

Non-Capturing Group(?:00(?:FF[a-fA-F0-9]{2}|[a-fA-F0-9]{2}FF)|FF(?:00[a-fA-F0-9]{2}|[a-fA-F0-9]{2}00)|[a-fA-F0-9]{2}(?:00FF|FF00))

1st Alternative00(?:FF[a-fA-F0-9]{2}|[a-fA-F0-9]{2}FF)

00the literal text 00

Non-Capturing Group(?:FF[a-fA-F0-9]{2}|[a-fA-F0-9]{2}FF)

1st AlternativeFF[a-fA-F0-9]{2}

FFthe literal text FF (case sensitive)

Character Class[a-fA-F0-9]{2}

{2}matches exactly 2 characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternative[a-fA-F0-9]{2}FF

Character Class[a-fA-F0-9]{2}

{2}matches exactly 2 characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

FFthe literal text FF (case sensitive)

2nd AlternativeFF(?:00[a-fA-F0-9]{2}|[a-fA-F0-9]{2}00)

FFthe literal text FF (case sensitive)

Non-Capturing Group(?:00[a-fA-F0-9]{2}|[a-fA-F0-9]{2}00)

1st Alternative00[a-fA-F0-9]{2}

00the literal text 00

Character Class[a-fA-F0-9]{2}

{2}matches exactly 2 characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternative[a-fA-F0-9]{2}00

Character Class[a-fA-F0-9]{2}

{2}matches exactly 2 characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

00the literal text 00

3rd Alternative[a-fA-F0-9]{2}(?:00FF|FF00)

Character Class[a-fA-F0-9]{2}

{2}matches exactly 2 characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Non-Capturing Group(?:00FF|FF00)

1st Alternative00FF

00FFthe literal text 00FF (case sensitive)

2nd AlternativeFF00

FF00the literal text FF00 (case sensitive)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

25 tokens

Regular Expression

^#(?:00(?:FF[a-fA-F0-9]{2}|[a-fA-F0-9]{2}FF)|FF(?:00[a-fA-F0-9]{2}|[a-fA-F0-9]{2}00)|[a-fA-F0-9]{2}(?:00FF|FF00))$

New

#FF00AD
#00FFFD
#0023FF
#E300FF
#B4FF00
#FFCC00

#FF0000
#FFFFFF
#456789