Dumb question: does changing the image on the screen actually change the output of blue light? I was kind of under the impression it was a result of the light s

Dumb question: does changing the image on the screen actually change the output of blue light? I was kind of under the impression it was a result of the light source. For example I think neon light is actually greenish and it is just the human eye that adjusts the colors back to normal. But I don't think one could make neon light behave like another type of light simply by painting it with some color.