Ofc You can!!But Red is a really hard color to maintain ! I've had it and it was frustrating ! There's a red shampoo for it but regardless the color strips fast !:/

You're only not supposed to get it wet again for 24 hours, so by Monday it should be okay. I'd shampoo it beforehand though just to make sure no color will bleed out into the pool. 😊 then condition it afterwards with some color treatment conditioner.