Mix your regular brown color with white.
You make brown / light brown by using red, green and yellow.
brown
brown... light.
A lighter shade of brown.
First you get dark brown, then you mix it with white and possibly a few other colors. Then you have light brown.
light green
Mixing equal parts of red and green light will produce a light brown color. This is because when red and green light are combined, they overlap to create the perception of brown.
Brown and white mixed together create a lighter shade of brown.
light brown and mauve
A light brown
taupe
Mixing equal parts of orange and black together will create a light brown color.