light skin women from east africa are mulattos. i made an extensive thread about it last year. there was a DNA study that came out and showed ethiopians and other east africans had (depending on the ethnic group) something like 35-60% non-African genetic ancestry. similar in percentage to what you find among "light skin black folks" in North and South America who have mixed with europeans and native americans over the centuries.
the only difference being that the east african racial mixing happened thousands of years ago between black africans near the Nile Valley and white caucasians migrating down from the western asia/the fertile crescent. pure east africans (with little caucasian ancestry) are found in the southern ethiopia region called the omo valley.
this is what PURE east africans look like minus the white ancestry.