glad to see above mentioned entries. I use only a limited palette. And I think not many people do so. There are so many benefits from it. As Johan alredy wrote there are so many color combinations and mixtures possible and what is so amazing to me: almost instantly you have a color harmony in your painting simply because the same red is in your orange tones or brown and violet colors. The same yellow is in your greens and orange colors and so on.
I challenge you if I may, to get from the tube any color out and mix it with your limited palette. Great exercise and great fun.
Here is a painting I did with just green, red, yellow and white.
If you want to check out my palette, here´the link to my blog.
Thank you in advance for visiting and happy painting