The best type of leather to develop a brown patina from white is full-grain natural vegetable-tanned leather. This leather starts out as a light, off-white or beige tone and, with exposure to sunlight, oils, and daily wear, will gradually darken to a rich, warm brown. Why full-grain natural vegetable-tanned leather is best Highest quality: Full-grain leather is the uppermost layer of the hide and has not been sanded or buffed, preserving its natural, breathable pores and fibers. Best tanning pro