OUTDOOR WEDDING

Hi everyone, I`ve always wanted an outdoor wedding but the triple digit temperatures isn`t going to let that happen...I`m getting married in a year and I`ve decided to have my outdoor wedding ...indoors....I`m using periwinkle as my primary color for the bridesmaids, daisys as my main flowers, and curly willow branches because they`re so dramatic with twinkle lights, I`m also using a swinging patio bench as the bride and grooms seat instead of the traditional chairs behind a big table.... Since the whole theme is "summer night dream" or an outdoor summer wedding at night......I don`t know what to use as centerpieces....I like candles, topiaries, but I can`t decide what I can use as a centerpiece...should I continue using the periwinkle color on the centerpiece? Any ideas?? please help...