who can i be?(riddle)

who am i?

I have three legs.

I can be brown,black and grey

who am i

My first post

I like blog because it's like a diary.

We get to share great stuff with people.

You can express yourself.

You can also communicate with your friends

You can have electronic or virtual.

you can write stories in it.

You can put pictures in your blog.

you can comment in your your friends blog.

you can put videos in your blog.