To answer another question, I've asked a friend of a friend to spoil its soul with the forbidden knowledge taken (in the ancient times) by a prometheus from the gods. By the way, we learnt that as well. The valid colors at that time were:
red, blue, green, orange, yellow, brown, violet, pink, silver, gold, black, white, and grey;
so you were out of luck. And 1+1 may equal to 1, 13, 49 or 94. Also the riddler will punish you for leaving the conversation with a question unanswered or cheating by guessing the answer without prior knowledge.