Orange-green-purple--these colors form a TRIAD on the color wheel. Somewhere along the line we called them tertiary colors, and apologize--technically the tertiary triad would be slightly off from the triad we request in this contest, more like blue-green than green.
But the triad in this contest is indeed orange-purple-green, and any shade of those hues counts, as long as they lean towards those colors.
Thanks Stan, we count on experience and vigilance from readers like you! You are valued members of our community!