Color theory primary colors work at all is that the imperfect pigments being used have sloped absorption curves, and thus change color with concentration. A pigment that is pure red at high concentrations can behave more like magenta at low concentrations. This allows it to make purples that would otherwise be impossible. Likewise, a blue that is ultramarine at high concentrations appears cyan at low concentrations, allowing it to be used to mix green. Chromium red pigments can appear orange, and then yellow, as the concentration is reduced. It is even possible to mix very low concentrations of the blue mentioned and
Orange (colour) became King of England in 1689, after the downfall of the Catholic James II. Due to William III, orange became an important political colour in Britain and Europe. William was a Protestant, and as such he defended the Protestant minority of Ireland against the majority Roman Catholic population. As a result, the Protestants of Ireland were known as Orangemen. Orange eventually became one of the colours of the Irish flag, symbolising the Protestant heritage. His rebel flag became the forerunner of The Netherland's modern flag. When the Dutch settlers of South Africa rebelled against the British in the late 19th