Of course, for the colonies located in Africa, the consequences were more negative than positive. The fact is that European countries exploited the labor of Africans very well, they were actually slaves, and for the kings who conquered these countries, this was a good income. But there are several positive aspects. Since there was a cheap labor force, after the industrial revolution it became profitable to build factories in Africa, and this is a plus, because after the colonies became independent they had infrastructure.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.