In your opinion what is the best brand paint for interior painting. Has to be mixed
To the selective color??

Mixing depends a lot of the skill and experience of the mixer, even though it's computerized, in my opinion. I see so many reduced price cans of custom colors on the reject shelf (and buy them sometimes)!
My local lumber yard sells Benjamin Moore, and I am very happy with it. And the woman in charge has a very good color sense, as well as being very knowledgeable about all the kinds and finishes (eggshell, matte, semi-gloss, pearl..) and even what you can mix, such as paints for metal with regular paints.
Home Depot has Behr and Martha Stewart and should have knowledgeable staff too. Not as crazy about the color choices for Behr (and it's a long walk to the door to check colors in sunlight) but it's fine for standard colors. I've bought little jars of Martha paint. For $10, I got a whole selection of about 30 different accent colors by a company called Bella.

Wonderful advice

Discover the adventure of color. Create unique paint color palettes for your home. Keep pace with the latest trends and styles in color choice.I agree Benjamin Morre is the best paint color for your home.

Go to your local library and get a copy of Consumers Guide annual. Have all kinds of paint ratings.

Very interesting