regex101: PCRE (Legacy) Match Workspace

^start of line

rgbthe literal text rgb (case insensitive)

a?optionally matches the literal a (97₁₀ / 141₈ / 61₁₆) (case insensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%),\s*(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%),\s*(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)(?:,\s*((?:\d{1,2}|100)%|0(?:\.\d+)?|1))?|(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)\s+(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)\s+(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)(?:\s+((?:\d{1,2}|100)%|0(?:\.\d+)?|1))?)

1st Alternative(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%),\s*(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%),\s*(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)(?:,\s*((?:\d{1,2}|100)%|0(?:\.\d+)?|1))?

Group 1(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)

1st Alternative25[0-5]

25the literal text 25

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

2nd Alternative2[0-4]\d

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\da digit

3rd Alternative1?\d{1,2}

1?optionally matches the literal 1 (49₁₀ / 61₈ / 31₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

4th Alternative(?:\d{1,2}|100)%

Non-Capturing Group(?:\d{1,2}|100)

1st Alternative\d{1,2}

\d{1,2}a digit, repeated between 1 and 2 times

2nd Alternative100

100the literal text 100

%the literal % (37₁₀ / 45₈ / 25₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

Group 2(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)

1st Alternative25[0-5]

25the literal text 25

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

2nd Alternative2[0-4]\d

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\da digit

3rd Alternative1?\d{1,2}

1?optionally matches the literal 1 (49₁₀ / 61₈ / 31₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

4th Alternative(?:\d{1,2}|100)%

Non-Capturing Group(?:\d{1,2}|100)

1st Alternative\d{1,2}

\d{1,2}a digit, repeated between 1 and 2 times

2nd Alternative100

100the literal text 100

%the literal % (37₁₀ / 45₈ / 25₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

Group 3(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)

1st Alternative25[0-5]

25the literal text 25

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

2nd Alternative2[0-4]\d

3rd Alternative1?\d{1,2}

4th Alternative(?:\d{1,2}|100)%

Non-Capturing Group(?:,\s*((?:\d{1,2}|100)%|0(?:\.\d+)?|1))?

2nd Alternative(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)\s+(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)\s+(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)(?:\s+((?:\d{1,2}|100)%|0(?:\.\d+)?|1))?

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

$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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Search reference

Regular Expression

^rgba?\((?:(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%),\s*(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%),\s*(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)(?:,\s*((?:\d{1,2}|100)%|0(?:\.\d+)?|1))?|(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)\s+(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)\s+(25[0-5]|2[0-4]\d|1?\d{1,2}|(?:\d{1,2}|100)%)(?:\s+((?:\d{1,2}|100)%|0(?:\.\d+)?|1))?)\)$

New

rgb(0,0,0)
rgb(255,255,255)
rgb(0%, 255, 255)
rgba(0%, 255, 0, 0)
rgb(0 0 0)
rgb(255 255 255)
rgb(0% 255 255)
rgba(0% 25 0 0)

bad ones
rgb(256,0,0)
 rgb(0,0,0)
rgb(255,255,255) 
rgb(0% 255, 255)
rgba(%, 255, 0, 0)
rgba(0%, , 0, 0)
rgba(0% 25)
rgb(0 0)
rgb(255 256 255)
rgb(255 255 256)
rgb(0% 255 -1)
rgba(0% 25 0 0 0)