our eye contains 2 types of cells called rods and cones. these cells are present in our eyes in them rods are for detecting the dim light with black and white colors and the cones are for detecting the bright lights with colors. these rods have a pigment called rhodopsin. so when the dim light is taken as stimuli from our eyes they can detected as the dim light and our rods cells would from an image in black and white. so we cannot see the bright colors in dim light.
hope so my answer is useful................^_^ !!!