Black-tipped/Scarce Blue Diadem Butterfly Hypolimnas monteironis
The Black-tipped Diadem Butterfly, also called the Scarce Blue Diadem, is native to forests of a swathe of central Africa from the West coast to the East.
The Black-tipped Diadem is from the Eggfly family of butterflies, hence the iridescent blue/mauve on brown.
Links:
Common Eggfly
Common Eggfly