Sketch and reference
Painting the Conifers
For the spruce branches on the right of the painting, I used Pthalo Green with Prussian Blue for the shadows. I needed to paint each needle, to avoid ending up with a green sky, which I painted then with Indigo and a wash of Dioxazine Violet. For the spruces closer to the warm candlelight on the left, I used Hooker's Green for the brightest branches.
Don't be afraid to use blue shadows for orange objects, such as the fox. If the light/shadow separation is dramatic, such as in a night scene lit by candles, your shadows will be blue or purple. Painting a wash of orange over this will create a naturalistic shadow.
For the buff coloration of the belly and face, I used very light washes of Naples Yellow, with a little Raw Umber. I used more Naples Yellow closer to the candle. Candles are a bit tricky to paint, since you naturally want to go darker the farther from the flame you are. Remember though - the light from the flame travels through the candle and illuminates it a bit, so be sure not to go too dark when painting close to the flame.