There are some colours i always use in my paintings. They constitute my main colors palette. Of course, for specific painting i can use others colours, but these colours are in all my paintings.
Cadmium yellow light
Alizarin Crimson
Phthalo blue
Ultramarine blue
And of course the Titanium White
As I said I can use others colors, sometimes Burn Umber for a quick touch of dark yellow without mixing colors, vermilion red for some orange red color difficult to get with Alizarin Crimson because it’s a red too purple.