Does anyone have any Mint Green ties and pocket squares to sell? I have Dessy Celadon Bridesmaid dresses and colour matching is a nightmare!
Have you seen these?
That looks about the right colour, but you could also get some swatches to make sure:
Can you not contact Dessy (or the shop where you bought the bridesmaids dresses from) and ask if they can sell you sample material by the metre for example?
Then you can get them made for your wedding party.