Question: How do you create tertiary colours for painting?
Option 0: A tertiary colour is a colour that is the result of subtracting primary colours like red, blue or yellow, from secondary colours, such as turquoise or orange. Chartreuse with red subtracted becomes Rose, another tertiary colour. Tertiary colours can become muddy if the primary colour contained non primary pigments, a common problem.
Option 1: A tertiary colour is a colour that is the result of combining primary colours, like red, blue or yellow, with  secondary colours, such as primary red and secondary purple to make a tertiary brown. Tertiary colours can become muddy if the primary colour contained non primary pigments, a common problem with some types of paint.
Answer: 1