Old Holland’s Cadmium Yellow Medium is similar in overall color category to Holbein’s Cadmium Yellow Light. In this case it’s Holbein that has the unexpected naming structure, as Old Holland’s Cadmium Yellow Medium is in a similar color category to other Cadmium Yellow Mediums, broadly speaking, in the neighborhood of Munsell 2.5Y (8 16+) where cadmium yellow lights tend more in the direction of 5Y.