Match everything except for specified strings

Question

I know that the following regex will match \"red\", \"green\", or \"blue\".

red|green|blue

Is there a straightforward way of making it mat

Answer 1

Depends on the language, but there are generally negative-assertions you can put in like so:

(?!red|green|blue)

(Thanks for the syntax fix, the above is valid Java and Perl, YMMV)