The best colour combination is purple and yellow. Due to the fact that the colours are opposite to each other in the colour wheel it creates maximum contrast when they are used together. (see image below Copyright © http://www.marlborough.oxon.sch.uk/)
When the two colours are used effectively the results can be quite impressive. One of the most extraordinary uses of this colour combination is in purple and yellow tulips (see image below Copyright © 2003 Katinka Matson). The contrast between the two colours makes the flowers really stand out.
Purple combined with yellow can also create some really eye-catching designs. There are several commercial uses of this colour scheme one of which is Galaxy FM (see image below Copyright © http://www.galaxyyorkshire.co.uk)
The two colours also have a more practical benefit which is shown with the Nike Total 90 Premier League Football (see image below Copyright © http://www.kitbag.com). This ball is used in games where there are low visibility conditions. The purple combined with they yellow makes the ball much easier to see compared to a white ball.
So purple and yellow are the best combination of colours. The colours are used to create some really striking commercial designs. Along with this they are also present in nature with the purple and yellow tulips.