we have never color coordinated for family pictures (well once for the grandkids we did, but only for the boys, my two wore light blue and my nephews all wore yellow polo shirts) otherwise we all just wear something really nice that we like and are comfortable in :) I'm not really a big fan of the "everyone dressed alike" look :)
Although one time I did make my hubby wear something he's NOT comfortable in ... his dress uniform LOL
I personally prefer to have everyone show their own personal taste, as long as it's nice and somewhat dressy :) This year for holiday cards we're going to pose in front of our new house, I'll be wearing my Lynne Swann Pittsburgh Steelers jersey, hubby will probably wear one of his San Diego Chargers jerseys and the kids will wear whatever is warm :)