white lion animal are not albinos. Their white colour is caused by a recessive trait derived from a less-severe mutation in the same gene that causes albinism, distinct from the gene responsible for white tigers. They vary from blonde to near-white.
This coloration does not appear to disadvantage their survival. The white lions of the Global White Lion Protection Trust (GWLPT) have been reintroduced into their natural habitat and have been hunting and breeding successfully without human intervention for a significant amount of time.