Regular Expressions 101

(?i)applies the following effective flags to the remainder of the pattern: gi

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

Group 1((?:\w+\s)?blue(?:\s\w+)?)

Non-Capturing Group(?:\w+\s)?

?repeats the group contents below at most once:

\w+a Unicode word character, repeated at least once

\sa Unicode whitespace character

bluethe literal text blue (case insensitive)

Non-Capturing Group(?:\s\w+)?

?repeats the group contents below at most once:

\sa Unicode whitespace character

\w+a Unicode word character, repeated at least once

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?i)((?:\w+\s)?blue(?:\s\w+)?)

New

My blue car # What I exactly want.
the blue jacket
their blue phone
a blue alien
End sentence. Blue is
is blue.

My blue car # What I exactly want.
the blue jacket
their blue phone
a blue alien
End sentence. Blue is
is blue.