Just found this and it will answer the question about the colour code FB
Please note that the following terms were used by the enumerators in 1901 and do not reflect current usage when describing a person's background.
"Racial/tribal origin" column:
The use of "breed" and "half-breed" indicated a person of mixed Native and other background as noted in the following examples that were used at that time:
Cree fb:Cree and French breed