Table 1: Observed and theoretical integrated colours for the selected globular clusters. Values from the Harris catalogue are dereddened according to Reed et al. (1988). The J-K near-IR colour is from Brocato et al. (1990a), dereddened according to Cardelli et al. (1989). ${\cal M}/L_V$ is from the compilation by Pryor & Meylan (1993).

Identity		 $M_V^{\rm tot}$ U-B B-V V-R V-I J-K ${\cal M}/L_V$
  Observations  
M 68 -7.35 -0.01 $\pm$ 0.01 0.58 $\pm$ 0.03 0.43 0.88 $\pm$ 0.01 - 1.6
M 15 -9.17 -0.03 $\pm$ 0.02 0.58 $\pm$ 0.01 - 0.73 0.62 2.2
M 30 -7.43 0.00 $\pm$ 0.02 0.57 $\pm$ 0.04 0.39 $\pm$ 0.02 0.82 $\pm$ 0.04 0.54 2.5
  Models  
M 68 -7.34 $\pm$ 0.05 0.00 $\pm$ 0.02 0.60 $\pm$ 0.02 0.42 $\pm$ 0.01 0.87 $\pm$ 0.02 0.57 $\pm$ 0.07 1.79 $\pm$ 0.07
M 15 -9.18 $\pm$ 0.02 0.00 $\pm$ 0.01 0.60 $\pm$ 0.01 0.420 $\pm$ 0.003 0.89 $\pm$ 0.01 0.59 $\pm$ 0.02 1.58 $\pm$ 0.03
M 30 -7.43 $\pm$ 0.05 -0.01 $\pm$ 0.01 0.59 $\pm$ 0.02 0.41 $\pm$ 0.01 0.87 $\pm$ 0.02 0.54 $\pm$ 0.05 1.76 $\pm$ 0.07


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