We all know that Yellow and Blue together make Green, but I have experimented with some combinations of these just to see how different they might be:
Aureolin Ultramarine Blue
Cadmium Yellow Ultramarine Blue
Changing the Yellow, altered the Green - that was using the Yellow as the first colour with the Blue added to it.
but what happens when I use the Blue first
Ultramarine Blue Aureolin
Ultramarine Blue Cadmium Yellow
Subtle changes but certainly changes.
I then tried a different combination - this time with Prussian Blue.....
Quinacridone Gold then added Prussian Blue
Prussian Blue then added Quinacridone Gold
So the moral of the story is - Try different combinations of colours - Experiment and have fun with them - make notes of what you have used, that way you have some useful colours to instantly fall back on when you are doing a painting.
Hope this has given you some ideas
Have a great week