Why are red kangaroos red?

Red kangaroos are not always red. it depends on their locality. The red kangaroo does have a reddish tinge to its brown fur, as opposed to the grey fur of the grey kangaroo and males can be a strong brick-red colour or a pale red. However, it has been observed that, in the eastern part of the range of the red kangaroo, away from Australia's red desert and semi-arid country, females are likely to be more grey in colour, whilst elsewhere within their range both males and females tend to be reddish-brown.