red light, green light, purple light?

so, a few weeks ago we were at my dad's house and we were watching a movie after church. alexa had fallen asleep and when we got in the car she woke up. we wanted to keep her awake until we got home. so, i was showing her the traffic lights and we taught her green means go and red means stop. she got it down quite well, and will inform us what color the lights are when we are driving.

so, being oh so close to 2, she is now figuring out new ways to get what she wants or avoid doing what she doesn't (i try to tell her that we are on to her games and it would be easier just to do what we say). so, we were eating dinner and she did not want to eat. andre was dealing with the situation and she says with a cute smile on her face "green...go....red....bop(stop)" we tell her good job, but eat. she looks at me and says "blue?" i say "blue means snow" (snow ban no parking that is). she goes through green, red and blue. i tell her that i know what she is doing and she needs to eat. she takes a few bites and says "purple?" i did no have an answer for that one. i am try to ind out a light that is purple to give her an answer. so far no luck. anyway, we were very impressed with her inquisitiveness!