They date from the preferred terminology at the time the organizations were formed. As to why they have not been changed, only the memberships could answer that. Here is one article regardin the NAACP, which says in part,
“The NAACP name is probably one of the last historic references to use the term “colored people.” Outside of the organization, it is perceived as outdated and politically incorrect to use the words “colored people.” So why not adopt the word “black” or “African American” instead?
What about the NAACP’s mission? Gordon, a retired Verizon executive (Verizon is No. 1 on The 2006 DiversityInc Top 50 Companies for Diversity® list), has said he wanted the NAACP to look to the next generation and to start offering social service, not just identifying injustices. But the 64-member board does not want to go in that direction, Chairman Julian Bond has said.
Is the NAACP still stuck in the 1960s? NPR senior correspondent Juan Williams says it is.
“The organization is trying to find its way in terms of the new racial dynamic in the country with Hispanics as the largest minority group,” says Williams, “with African Americans more affluent and politically powerful than ever and yet having to deal with the persistence of a 25 percent poverty rate.”
The United Negro College Fund has done some repositioning of its brand:
”. . .the United Negro College Fund has launched a new branding campaign that differs only subtly from its old one.
New UNCF logo
Far from ditching the memorable tag line it has relied on for more than three decades — “A mind is a terrible thing to waste” — the United Negro College Fund has made the tag line a more visible part of its new logo (right), to help ensure more people make the mental connection between the slogan and the organization.
At the same time, the organization has removed its full name from its old logo (below), choosing instead to prominently display its abbreviation, UNCF.”