Diamonds on the traditional colour chart range from colourless to faint yellow. Fancy Colour Diamonds on the other hand are diamonds that portray any other colour face up. These rare specimens include; yellow, brown, green, pink, and blue. Diamonds in the traditional D-Z colour range usually decrease in price as the colour moves more towards the end of the spectrum. However in Fancy Colour Diamonds the complete opposite occurs, and so their value generally increases with the strength and purity of the colour.