A fun art 'color' word search PDF with more unusual names of colors to find - azure, chartreuse, coral, crimson etc.).
These print well at A5 (two to an A4 sheet) so are an economical, fun way to embed student learning and literacy; extending vocabulary on any colour-related scheme of work.
Quotes from Joseph Albers, Sonia Delaunay and Georges Braque also encourage critical thinking on color.
You might also be interested in my lesson on the color wheel... check it out here