It depends on which blue and which brown you use. There are a wide variety. For example if you mix ulra marine blue and burnt umber you will get black. Adding blue to a reddish brown will make the brown darker, but also more violet. Using a yellowish brown and blue will give you more of a greenish brown.
You have to experiment with the colors on your pallet to see exactly which one you get.
The related link below will help you understand more about mixing colors to get the ones you want.
black
brown green=blue
brown
it depends on what color blue and what color brown usually the blue makes the brown darker and usually adds a violet tent to.
Blue is a pure color, primary. Brown is red with a little black. You'll need to start over.
No, it makes brown. Red and blue makes purple.
pollution and lots of it.
Orange and blue mixed together makes brown
red, blue, green, orange, purple, and yellow makes brown
muddy brown. red plus green (which is blue plus yellow) makes a muddy brown since it's all three primary colors.
Red and Blue
Well if red and blue makes purple, add green which makes brown so adding gold would make a metallic brown/gold hope this helps
Heterochromia.