Regular Expressions 101

Pro

^start of line

<color>the literal text <color> (case sensitive)

Group 1((?!black).*?|black.+?)

1st Alternative(?!black).*?

Negative Lookahead(?!black)

blackthe literal text black (case sensitive)

.*?any character (except for line terminators), repeated any number of times

2nd Alternativeblack.+?

blackthe literal text black (case sensitive)

.+?any character (except for line terminators), repeated at least once

</color>the literal text </color> (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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

^<color>((?!black).*?|black.+?)</color>$

New

How do I write a regex expression that matches these lines

<color>blue</color>
<color>green</color>
<color>black</color>
<color>blackish</color>
<color>offblack</color>

:)

Substitution

How do I write a regex expression that matches these lines

<color>blue</color>
<color>green</color>
<color>black</color>
<color>blackish</color>
<color>offblack</color>

:)