I happen to have answered this very question online previously, I hope you don't mind me copying my response
"Well it's quite a long story actually, my mind tends to share allegiance between two separate colors! They both get really jealous of each other but as long as I keep them mostly separate it works out fine. Orange came to me early in life; it never let me down all those classes in Kindergarten when all the other markers just weren't doing the job. It stood out. It was a bright shining beacon of the hope and promise that a boy of that age needs so desperately. Green came to me later in life, and I'm not sure exactly why. It could be perhaps that I began to just colors based on their individual merit and not based simply on how shiny their markers were, and while orange stood out to me in that context, green in it's many shades and forms stood out to me more when encountered in other natural organic forms. That mistress orange, however, I will never forget. She came to me in a time when I needed her most, and memories of that sweet, beautiful orange marker will never leave me."