We present BVIJK photometry of the black–hole candidate GRO J1655–40 in full quiescence . We report a refined orbital period of 2.62191 \pm 0.00020 days . The light curves are dominated by ellipsoidal variations from the secondary star . We model the light curves with an upgraded code which includes a more accurate treatment of limb darkening . Previous models containing a large cool disk are ruled out , and indeed our data can be fit with a pure ellipsoidal light curve without any disk contribution . In general agreement with previous results , we derive a confidence region of the correlated quantities inclination and mass ratio , centered on an inclination of 70.2 \pm 1.9 \arcdeg and mass ratio of 2.6 \pm 0.3 , resulting in a primary mass M _ { 1 } = 6.3 \pm 0.5 M _ { \sun } ( all 95 \% confidence ) . The complex limits and errors on these values , and on the possible disk contribution to the light curve , are discussed .