The Color Line: The Problem Of The Twentieth Century

"The problem of the twentieth century is the problem of the color-line—the relation of the darker to the lighter races of men in Asia and Africa, in America and the islands of the sea.” --Du Bois
The color line started as an abstract concept to explain the presence of an invisible line between Black and White people during racial segregation and after the abolition of slavery. In fact, even if in theory, after the abolition of slavery, all human beings were declared equal, in practice there was still a separation of activities such as attending school or riding a bus between white and black people. For example, there was an invisible line between White people and Black people sitting on a bus, or an invisible line between White communities and Black

Where do I stand if my mom is Japanese and my dad is Afro-American? Where do I stand if my grandma is American Indian, my dad Afro-American, and my mom White? How can I define who I am from the color of my skin, or from rigidly defined categories or groups?
In the same way, If we create a different color line to accommodate human diversity--a line composed of various degree of lightness and darkness of skin tone-- we will still have people questioning the line because our skin tones does not define our identity. Take as an example, Brazilian African parents with dark skin, and their albino children. Where does this family stand on the color line? Do we place the children on one extremity of the skin tone line and the parents on the other extremity of the skin tone line? According to the color line, are they still part of the same family?
The color line misleads the identity of this family and it wrongly promotes racial categories, stereotypes, and false