Why is blue rendering as white?

I made a part in solidworks I want to act as a blue light.  Everything shows up the way I want it, but when I render the picture the blue shows up white.  I've changed the color to orange, green, red, yellow and purple and they all render properly, but when I put it back blue, it renders white.  Does anybody know why this is happening? Thanks in advance

SolidworksGeneral