Have you actually seen the shade of "dusky pink" or has the customer said its called dusky pink. Peoples perception of colours (and what they name them to be) are wildly different from one person to the next.
I've had a woman in the shop before now complaining that the peach carnations I'd used in a basket arrangement were pink and not peach (i HAD used peach) when I asked her to pick out the peach carnations she liked in the shop, she picked out bright orange.
When dealing with wedding flowers, you have ONE shot to get it right, if you screw up they can never have that day again. I ALWAYS ask to see samples of fabric before ordering the flowers, so really planter it is difficult for any of us to really give you an answer without seeing the colour you are trying to match or compliment. dusky pinks are the most difficult to match, getting the wrong shade of flower can throw a whole wedding scheme. Ivory is another colour which is difficult, too white a rose against a creamier shade of ivory fabric and it can make the dress look dirty. My advice to you would be to get some samples of fabric and take them to your wholesaler, they can advise you on the best variety of roses and when their delivery is possible to you.

It seems I have upped the pressure on you for getting these flowers just right... good!. Designing a brides wedding flowers is an extremely important job and should not be done without proper research, knowledge or skill.

I do appreciate however, we have all had to do our first wedding some time and you do obviously want to do it right or you wouldn't have asked a question on this site! So I wish you good luck and hope all goes well!
Jo