Loie Fuller was an American modern dancer whose career was mainly in France where she introduced Isadora Duncan.
This is an 1896 film made by the Lumiere brothers and it is not, as I first presumed, hand-tinted. The beautiful colour effects are apparently lighting innovations invented and patented by Fuller and projected onto a silk dress. (It is not Fuller herself in this film, but it is her dance.)
Fuller was painted by Toulouse-Lautrec and was close with Queen Marie of Romania. Eh... incredible!!