Dark blue is on the other side of the colour wheel from brown. Brown is only on colour wheels that have a lot of different shades of colour.
Brown is a tertiary colour, which means it is made by mixing either two secondary colours or one secondary colour and one primary colour. Brown is made by mixing orange, red, and yellow in different ways. Depending on the shade of brown, the opposite colour on the colour wheel could be either a deep violet or a deep blue-green. Most of the time, colours that are opposite each other on the colour wheel are complementary, which means that they look good together in decor, art, or fashion.
