The Color Underground is a cute texture pack in bright and joyful colors. It looks good for most types of creations but mostly so for normal survival adventures and RPG styled creations. As it is a low-resolution pack it should work fine on most devices, even low-end. I ported this texture pack (which took a few good hours!) just to see if I could do it. This is the result. It's not 100% perfect but close to it!
Creator: Aurum_32 (original PC pack)