Thank you Juvysen!
My first thought when reading this post (as a midwife) was "no, no! we need to see how much blood you lose!" Covering the pool with a dark color would be a definite no-no in my book. You could, however, consider stepping right outside the pool onto an area with chux pads etc. and squat and deliver the placenta there (works to keep blood out of the pool).
My second no-no (as much as I think it's great getting the Daddy involved) is giving the baby to him around this time. The time period before and shortly after the placenta is the MOST important time to have that baby with you. The baby's job is to nurse, keeping your uterus contracted to help with blood loss (and to help deliver the placenta). At homebirths, we don't rely on medications like pitocin to do this for us. We let nature do it's thing and make sure that baby latches!!! There will be time shortly after that whe you will want to eat and/or shower and that would be a much less critical time to let the dad watch the baby.
Best of luck!