>>5892863>limited palette>10 colorsJust to be clear, 10 colors is *not* a limited palette. A limited palette is 3/5 colors. Split primaries+white gives you something very close to a full chroma palette, to which you can add a brown or a few other low-chromas, which will gets you close to 10, and perhaps a cyan/magenta if you don't have them already and need them for your subject.
Now to answer your question, if you haven't already, try to paint with brown+black+white or brown+ultramarine+white. Those are what we could call "temperature" palette: you have a full value range, to which you can add some variety by playing with temperature.
This has one big advantage as an exercice: it forces you to interpret the colors rather than copying them. Something like the Zorn palette gives you more space in terms of chroma, but you'll still have a certain degree of interpretation for most subjects.
As for mixing colors, you can thing in terms of HSV: the often difficult thing is to find the correct saturation, and to reach it while maintaining both hue and value. The more limited the palette, the less mixing options you have, the simpler it is to mix things. As a recall, saturation can be decreased by mixing in the opposite color.
Say, in a Zorn palette, if you want to dull a red, you have use a green, that is, ochre and black, balancing the two so that your dull red still feels red, and not too orange or too purpleish. The process is similar for other colors, and for less limited palette, only you have multiple ways of reaching it.
That's 80% of the theory, the real difficulty is practicing it until in becomes second nature, then managing some pigment's properties (transparency, cadmiums's opacity; phtalo's strength, costs, lightfastness, etc.). And finally, to use this technical knowledge to actually express something nice.
