Best way to submit many (equally named) parameters in GET/REST

Question

For a REST interface:

What is the best way to allow the client to set many equally named parameters in a GET?

For example if the client should specify multiple possible colors

www.example.com/products/{color=green|color=yellow|color=white| ...}

Answer 1

Something like this would be fine:

GET http://www.example.com/products?colors=green,yellow,white

Despite popular opinion, there is no REST constraint that says you should not use query string parameters.