The bright pinks will be a punch all right! and a touch of lime will add color contrast/compliments. I do think you'll need an occasional "light pink" to add to the values (and the cream does too, but it's not a color, per say.) Darks AND lights as well as most mediums? I believe "they" suggest 50% med. and 25% dark and 25% light over all the quilt. Your lime counts too. Good luck and please post a pic when finished! It should be lovely!