"So for fun, I created this color thesaurus for your reference. Of course, there are plenty more color names in the world, so, this is just to get you started." ~ Ingrid Sundberg http://ingridsnotes.wordpress.com/2014/02/04/the-color-thesaurus/
Have the students make their writing "more colorful" by using paint strips. Write a boring adjective at the bottom of the paint strip on the most boring color. Give each student a paint strip and they can use a thesaurus or a word wall to think of "more colorful" words for their strip. Put the best word on the brightest part of the strip.