Old Holland Oil Yellow-Green Organic Opaque. It is very dense, permanent and opaque.
Liquitex Acrylic Vivid Lime Green Translucent is translucent.
This is a color that is easy to make but easier to buy.
A color that I use in every landscape painting either pure or in mixes. Mix it with cadmium yellow light 5:1 Thalo blue for cool yellows or green for a warm side yellows.
Find this color on a real color wheel.