regex101: JavaScript Match Workspace

^start of line

rgbthe literal text rgb (case sensitive)

Character Class[(]

(the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:\s*0*(?:\d\d?(?:\.\d+)?(?:\s*%)?|\.\d+\s*%|100(?:\.0*)?\s*%|(?:1\d\d|2[0-4]\d|25[0-5])(?:\.\d+)?)\s*(?:,(?![)])|(?=[)]))){3}

{3}repeats the group contents below exactly 3 times:

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

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

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

1st Alternative\d\d?(?:\.\d+)?(?:\s*%)?

\da digit

\d?optionally matches a digit

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:\s*%)?

?repeats the group contents below at most once:

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

%the literal % (37₁₀ / 45₈ / 25₁₆)

2nd Alternative\.\d+\s*%

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

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

%the literal % (37₁₀ / 45₈ / 25₁₆)

3rd Alternative100(?:\.0*)?\s*%

100the literal text 100

Non-Capturing Group(?:\.0*)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

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

%the literal % (37₁₀ / 45₈ / 25₁₆)

4th Alternative(?:1\d\d|2[0-4]\d|25[0-5])(?:\.\d+)?

Non-Capturing Group(?:1\d\d|2[0-4]\d|25[0-5])

1st Alternative1\d\d

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da digit

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 Alternative25[0-5]

25the literal text 25

Character Class[0-5]

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

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

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

Non-Capturing Group(?:,(?![)])|(?=[)]))

1st Alternative,(?![)])

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Negative Lookahead(?![)])

Character Class[)]

)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative(?=[)])

Positive Lookahead(?=[)])

Character Class[)]

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Character Class[)]

)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

Search reference

Regular Expression

^rgb[(](?:\s*0*(?:\d\d?(?:\.\d+)?(?:\s*%)?|\.\d+\s*%|100(?:\.0*)?\s*%|(?:1\d\d|2[0-4]\d|25[0-5])(?:\.\d+)?)\s*(?:,(?![)])|(?=[)]))){3}[)]$

New

#0F0F0F
#123
#1234
#ABC456
#1234567
rgb(1,2,3)
rgb(1,2,)
rgb(112233)
rgb(255,249,199)
rgb(256,249,199)
rgb(255,249,199,)
rgb( 100%, 199, 50%)
rgb( 100%, 199%, 50%)
rgb(1,2,3%,.5)