Firstly, Österbotten and other Finnish regions did not became Swedish colonies when they were incorporated in the Swedish Kingdom in the Middle ages, in the same way Skåne did not become a Swedish colony when it became a Swedish province in the 17th century. Administratively, these regions were Swedish provinces (landskap) and not Swedish colonies, fully incorporated in the Kingdom of Sweden. Finland and Sweden was one country.
Secondly, since you claimed there is racism today towards Finns in Sweden, I corrected you by the fact that you didn’t separate between racism and xenophobia. Finns are not attacked on the streets in Stockholm based on their “Finnish race”, in the way African Immigrants are, simply because Finns and Swedes are indistinguishable. Nor have any relatives or friends in Sweden been attacked or threatened by ethnic Swedes simply because they speak Finnish. Never, ever! I, my family, friends, acquaintances and other Swedish speakers are however attacked and threatened on a daily basis, simply because we speak our own language in the Capital of our country. Finns in Helsinki are by far more hostile against Finno-Swedes (very), than Swedes in Stockholm are against Finns (not at all). In this respect xenophobia is much more prevalent Finland than in Sweden, at least in respect to Finns in Sweden, and Finno-Swedes in Finland. This in an indisputable fact.