Alumni from three New England colleges may have an easier time investing in one other’s companies after the launch today of several new private venture capital funds. Green D Fund, BlueCat Angel and Blue Ivy Venture all aim to support alumni- or student-led companies with alumni-backed investment from Dartmouth College, the University of New Hampshire and Yale University, respectively. All three funds are the latest in a series from Launch Angels Management Company. Their first, Green D’s predecessor, raised $1.5 million from 44 Dartmouth alumni and has so far invested in 10 different companies, all with Dartmouth alumni in leadership positions. The funds are private, for-profit and otherwise unaffiliated with the colleges.