The first part of the CRAYOLA Crayon color name is an adjective describing the second color name on the crayon. Green-blue is really blue with a touch of green, while blue-green is really green with some blue pigment in the crayon. The same holds true for orange-red and red-orange. If you have any further questions, please contact us by calling toll-free (800) 272-9652 weekdays between 9:00 AM and 4:00 PM Eastern Time.