there doesnt seem to be any roan on her papers. here are the colors top to bottom left to right:

Black/Tobiano
Sorrel/Tob/Tov
Bay/Tobiano
(Thoroughbred)
Sorrel?Tobaino
Sorrel/Overo
Bay/Tobiano
Sorrel/Tobiano
(Thoroughbred)
(Thoroughbred)
Black/Tobiano
Black/Tobiano
Bay/Overo
Black/Solid

Her mom has similar coloration but she is mostly white except for a chest plate and some on her hind quarters (i think)

could this also be due the overo in her back ground? im not very good with the whole paint colors

Thanks!