To start, consider white light to comprise of the three essential shades of light - red, green and blue. On the off chance that white light is sparkling on a shirt, then red, green and blue light is sparkling on the shirt. In the event that the shirt assimilates blue light, then just red and green light will be reflected from the shirt. So while red, green and blue light sparkle upon the shirt, just red and green light will reflect from it. Red and green light striking your eye dependably gives the presence of yellow; consequently, the shirt will seem yellow. Hope this helps!