Japan's Miyazaki city has a variant of theKing of Fruits that might just change your idea about the yellow and red fruit. Primarily because this mango is purple!    
The Miyazaki mango was originally grown in Miyazaki city in Japan's Kyushu prefecture. The variant derives its name from the city of origin.  

The mango is usually over 350g in weight and have 15% or higher sugar content.

The mango is popular for its different appearance and colour than the usual mango varieties which are popular in India and Southeast Asia. The fruit is reported to be ruby-coloured. These mangoes are also known as "Egg of the Sun" (Taiyo-no-Tamago in Japanese).