  The Isolated Horizon formalism, together with a simple phenomenological model
for colored black holes was recently used to predict a formula for the ADM mass
of the solitons of the EYM system in terms of horizon properties of black holes
{\it for all} values of the horizon area. In this note, this formula is tested
numerically --up to a large value of the area-- for spherically symmetric
solutions and shown to yield the known masses of the solitons
