Lately I've been color crushing on navy, in particular navy long sleeve dresses. It's that time of year where it's still very much summer, but you don't want to invest in another bright, summery dress for that occasion you have to attend. A long sleeve option is a sure win. 

earrings: Lele Sadoughi  |  dress: Shopbop  |  shoes: Cecelia New York

similar dress options here and here