Anal sex, the color of the rectum

Sometimes in porn when their's an anal scene and when the woman's anus is being gaped you see that the inside is redish as opposed to the vagina which is pinkish.

I was wondering in the inside of the rectum normally redish or is it because in the scene the dude is being rough and the rectum i being abused?

Is the rectum normally pinkish like the vagina?