S A T E E N K A A R E N   U N O H D E T T U  V Ä R I

Isaac Newton, when describing the colour spectrum of a rainbow, listed 7 colours: Red, Orange, Yellow, Green, Blue, Indigo and Violet. But today Indigo often gets left off this list of rainbow colours; leaving the 3 primjäary and 3 secondary colours we are familiar with.