A female Ficus treubii from the Sabah Ficus Germplasm Centre (SFGC) at Tabin in Sabah.
Once the fig is cut in half the flesh of the ripe fig changes to dark purple over a period of around an hour.
See these other articles on Ficus treubii.
Ficus treubii (male): Purple sap at Sg Senentang, Kapit, Sarawak
Ficus treubii (male): The chameleon fig
Ficus treubii: Are male figs toxic to animals ?
Information and photos thanks to the staff at the Sabah Ficus Germplasm Centre