Thinking Thursday #4

OK, so let’s have a little more fun with another Thinking Thursday puzzle. This is an old one, but like all such not too obvious until you know the answer.

A bear walks south for one kilometre,
then it walks west for one kilometre,
then it walks north for one kilometre
and ends up at the same point from which it started.
What colour is the bear?

As always there’s no prize except the fun of being a smarty-pants and getting it right. But if you want to show off by putting your answer in the comments, then that’s fine with me!
Answer on Sunday evening, as usual.
And also as usual, no cheating!