White vein kratom is the category of kratom that all white strains belong to. Each strain is harvested from majority white vein leaves, meaning the leaves that were harvested for the batch have a whitish stem and vein color. The veins itself don’t influence the color of the powder for any given strain as the color of all leaves are green. The drying process and maturity of the leaves harvested can impact the color of the powder. White strains are said to be most stimulating of the three veins.