A hard-to-find yellow with high lightfastness. Most manufacturers give this color solid 8's (highest marks) for lightfastness, with just one showing a bit of fall-off in tints. PY154 may have better lightfastness than PY151. While common in watercolors, this is a fairly rare color to find as a single pigment in oils.
According to this article it is used as John Deere yellow. It was recently made by Daniel Smith before they ceased to make oil paints. However, it can sometimes be found as a constituent of blends.
