Brown on 1st day of AF?

Cara • Expecting our first baby Jan 1st 2016! Married my best friend after 8 years together 10/10/14.
Has anyone had dark brown instead of red on their first day of AF? This was my first cycle off of the ring so I'm not sure what's normal. AF was due today for me and I woke up and after peeing there was dark brown instead of red. I'm confused!