Bright red blood can also be a sign of inflammation/bleeding in the low low colon, e.g., proctitis. (Ask me how I know, lol.)

As a rule of thumb, the farther the blood has to travel, the darker it'll be. Blood from high up enough in your GI tract will be a black, tarry substance, NOT red, but it's absolutely blood and you need to get that checked out ASAP.