Having never taken the time to lay out any proper egg tempera color charts, I figured it was time to get a bit organized. This scan really doesn't do justice but it does give some idea of the colors and values. From left to right is transparent to increasing opaqueness, mixed with titanium white.
The fourth one down, Rublev's Chromium Oxide Green is a reasonable start for a leafy green. Of course, there's plenty of opportunity to glaze with or over blues or greens for tuning in the right color. Kremer offers a Phthalo Green Yellow Shade that will, along with some other very beautiful pigments, soon be in my assortment.
This chart was painted on Strathmore Bristol Plate, a fine surface for these charts.