I need advice on what colour scheme I should go for for a bedroom, 2 girls ages 19 and 20 sharing together.

I was thinking the walls should be white but not sure about the curtains and if I should throw in any pop of colour or patterns?

The carpet is in need of replacing- should i go for light coloured wooden floor or a carpet? If carpet, which colour (should match with curtains).

And, is it better to add a chest of drawers in the space where a desk used to be, or should I add 2 bedside tables?

Any suggestions would help a great deal, and please answer ASAP as I plan on redecorating this week.