The color you see in light with no red or blue is green.
The color you see if you are looking at light with no red or blue is green. When red light is absent from white light, the human eye perceives its complementary color, which is green.
Similarly, when blue light is absent, the eye perceives its complementary color, which is yellow.
This phenomenon is known as color vision and is a result of the ratio of activity of our three types of cones in the retina.