I seem to have a trouble mixing a deep green with oil paints. I have to get this green to use for forest shadows and backgrounds of flowers etc. Most of the stuff I mix ends up looking like artificial green. Please help!

I suppose a need a goodbook on color theiry. Any suggestions? I am self taught artist.

The best mix thalo blue with medium yellow and yellow light or pale . I sometimes add a little portrait pink or alizarin crimson for adjustment.

Hi,

Usually a coulour can be darken using its complementary.
This is also used to get some interesting greysh tones.
Mind that when mixing an orange and a blue, one needs to known the pigments as not to get greenish colours (unless one wants to).
It also happens that mixing colours of different values (darker/lighter) tends to make «mud».
When I want to make a dark green using for insteance Sap Green, I may use Vermillion or Allizarin and then I may or not use a bit of ultramarine blue. And sometimes a bit of black.
These are things that you learn from experimenting. Namely because what suits for my taste may not suit for yours.
Also note that usually mixing more than 3 different hues (colours) there's the danger of dulling (mud).
This is the experience I have, but I'm a beginner.

Kind regards,

José
http://sitekreator.com/hushcolours/index.html