I know with our black neon tetras it is completely normal and expected for them to be pale when the light comes on in the morning. Our tiger barbs are the same. Also, fish won't eat as much the first few days while they are adjusting to the new atmosphere, so that isn't abnormal either.
Keith & Ashley
65 Gal - Freshwater Community Tank
55 Gal - Mbuna Cichlid Tank
10 Gal - Betta tank