Chakra, Reiki - Meaning of what colors I "felt"?

Today we were practicing reiki and learning about chakras in class and I kept seeing the color (light)blue in my center from naval to throat in a straight line when we were practiceing, I didn't have time to ask my teacher why and I won't be seeing my teacher again until Thursday but its really bugging me!! Anybody who practices Reiki or know about Chakras please speak up!!