There are degrees of color referring to degrees of mixing. The offspring of a white and black (Dost) is a Mulatto. That of a Mulatto and a White is a Mustee (Mustice). That of a Mulatto and a black is a Sambo. That of a Mustee and a white is a Castee. That of a white and a Castee is a Pustee. That of a white and a Pustee is White.
Rarely are the colors so well organized as they are in these documents.
The record of 1827 may indeed be an emancipation date. In the first few columns it shows how freedom was obtained and Louisa is listed as "free bought". So her freedom was purchased. The last column says that her freedom was purchased from ML Krause in 1827. It also says she was Episcopalian. So, I'd first look for slave tax forms for ML Krause between 1807 and 1827 to see if there is a Louisa listed of the appropriate age. Then I'd look at the Anglican baptism records on FamilySearch for a baptism around 1807 and creep forward (maybe baptized later). Focus on slave lists. These may show a father's name.