She turned the white house solarium into a kindergarten for her children and some select other kids. She included White House Press Secretary Andrew Hatcher’s son, who was African American. https://carlanthonyonline.com/2013/02/08/obamas-girls-teddys-boys-jackie-kennedys-kindergarten-school-tales-of-white-house-kids/

“Her support of civil rights showed in her integration of daughter Caroline’s school class, in her support for a memorial to black activist Mary McLeod Bethune, in her visits to poverty-stricken areas of Washington, DC, and in her request that a black opera singer entertain at the White House.” https://millercenter.org/president/kennedy/essays/kennedy-1961-firstlady

So, as far as the official narrative is concerned, no. She was on board with her husband’s civil rights platform.

What exactly makes you think she was or wasn’t? What prompted this question?

Probably. But not any more so than any other privileged white woman of that era.

Source: Just an assumption, as I haven’t stumbled across anything explicitly stating that she was anything else.

EDIT: I’ll defer to Disregardable for more substance, as it would seem she was actually LESS racist than her contemporaries.