Boston Fashion Week kicks off Friday with a party at Aloft Boston Seaport hosted by “America’s Next Top Model” winner Eva Marcille. The event will feature runway and trunk shows with various brands, a makeup bar, and a DJ. Organizers of Boston Fashion Week are also paying tribute to Bill Cunningham by encouraging fashionistas to go #BLUE4BILL at events — in other words, wear something blue. Cunningham, a celebrated fashion photographer for The New York Times who died in June, was usually attired in a blue workman’s jacket that, according to GQ, he bought at a hardware store in Paris for $20.