Postponement/wedding color

So we had to postpone on April 18th wedding, and the new date is in July. Our colors are purples, silver and dark green. Very spring. But now I'm worried that dark green isn't summery enough, and now I'm not sure what to do. What colors should I use instead? Obviously I can't change the bridesmaids dresses( which are lavender and wisteria), but I can change the groomsmen ties,and flower girl dresses. I'm just not sure what colors I should switch them out with. Any suggestions on making a spring wedding into a summer wedding?