Tessa Slagle, 17, an incoming senior at Rangely High School, is one of 64 youth ambassadors representing her Colorado county during the eight-week Making Colorado internship and marketing program.RANGELY I Last month kicked off Governor John Hickenlooper’s commission to engage Coloradans in a statewide branding effort that aims to “capture the spirit and energy that exists in Colorado today,” according to the Making Colorado Tumblr page. And with the help of Rio Blanco County…