I think the rarest color that we have is actually an entire bowl of Indian yellow, and this is a pigment that is made from the dried urine of cows that are fed only on mango leaves.

我觉得我们这里最稀有的一种颜色是一整碗的印度黄。这种颜色是由干燥后的牛的尿液制作而成的，而且这种牛必需只吃芒果叶。