\begin{table}%T2
\caption{\label{tab_col}Observed and model colors with filter~{\it F547M} as the zero point. The
observed colors are here corrected for foreground Galactic extinction. The
three models~(a),~(b) and~(c) shown here stand for~$m_{\rm up}=120$~$M_{\odot}$,
$Z=0.004$, and respectively,~$\alpha=1$, 1 and~2.35 and~$\tau=2$, 3 and~4~Myr. We
also show the three tested extinction laws in the form~$f(\lambda)=A(\lambda)/E_{B-V}$. The color differences~$\Delta(M_y-M_\lambda)$
between the observations and a given model were to be well fit by a function of
the form~$a+E_{B-V}f(\lambda)$ for the tested extinction law to be accepted.}
%\centering
\par
\begin{tabular}{ccccc}
\hline\hline
Filter & {\it F547M} & {\it F439W} & {\it F336W} & {\it F170W} \\
$\lambda$ ({\AA})& 5470 & 4300 & 3330 & 1740 \\
\hline
Obs.~$M_{547}-M_\lambda$ & 0.00 & 0.84 & 1.48 & 3.03 \\
 &~$\pm$0.03 &~$\pm$0.03 &~$\pm$0.04 &~$\pm$0.05 \\
\hline
$M_{547}-M_\lambda$ (a) & 0.00 & 0.96 & 1.85 & 4.10 \\
$M_{547}-M_\lambda$ (b) & 0.00 & 0.87 & 1.49 & 3.22 \\
$M_{547}-M_\lambda$ (c) & 0.00 & 0.82 & 1.19 & 2.94 \\
\hline
$f(\lambda)$ (Galactic) & 3.21 & 4.18 & 5.06 & 7.80 \\
$f(\lambda)$ (LMC) & 3.10 & 4.13 & 5.37 & 9.25 \\
$f(\lambda)$ (SMC) & 2.72 & 3.65 & 4.65 & 10.51 \\
\hline
\end{tabular}
\end{table}