using regex to substitute a string expression

Question

I would like to create a pattern using regex. here is an example : dark blue red colored.

basically I wanna use regex to create a pattern that would select the expression whatever the color is. something like dark (word) colored

Can anyone help me please.

Answer 1

The following REGEX allows you to extract the color assuming dark and colored are static.

Matches in this example:

dark red colored - group(3) = red

dark red blue colored - group(6) and group(7) = red blue

^((dark)\s([a-z]*)\s(colored)|(dark)\s([a-z]*)\s([a-z]*)\s(colored))$

Debuggex Demo