When I was 16 and taking my first watercolor painting class with professional quality supplies I was introduced to M. Graham watercolor paints and I've been using them ever since!
The following are the most used colors in my palette and what I use for all of my in person Watercolors Made Easy classes! When you click on one of the colors, you will be redirected to Dick Blick Art Supplies and I do get a small commission when you purchase with the links that I will use towards buying more art supplies!
Check out all the colors on Dick Blick with this affiliate link!