I can’t see any light color effect when rendering. I’m trying to put blue light behind model to have this rim light effect but it’s totally invisible like light is still white) I also tried changing front light color and it doesn’t seems to have any effect on the model render. Am I missing some setting form render panel to see light color?
Are you using a matcap material ? They have the lighting already baked into them. Use a non matcap and you should see the lighting having an effect
Also you need to use Best Render for colored lights.