Cadmium Yellow
Phthalo Green Yellow Shade
This is a fascinating almost-yellow color that is every so slightly greener and brighter than a high chroma 10Y in Munsell. If you love yellows, having a barely-green yellow is nice. The paint consistency is fairly thick, opaque and has an impasto quality. With yellows, the tiniest bit of green will affect a mix dramatically so it can be nice to have this super-cool yellow with just a dot of green already incorporated.
Gamblin adds this to the description: “Cadmium Chartreuse is among the most intense colors in the Gamblin palette.” They classify this color as cool.