\begin{table}%t3
\caption{\label{tbl3}The RGB colors of the observed bulge clusters at different magnitudes.}
%\centering
\par
\begin{tabular}{c c c c c c c c c}
\hline\hline
Target & $(J-K)_o^{-5.5}$ & $(J-K)_o^{-5}$ & $(J-K)_o^{-4}$ &
$(J-K)_o^{-3}$ & $(J-H)_o^{-5.5}$ & $(J-H)_o^{-5}$ & $(J-H)_o^{-4}$ &
$(J-H)_o^{-3}$ \\
\hline
\multicolumn{9}{c}{This paper} \\
\hline
NGC~6235    & $0.853\pm 0.04$ & $0.794\pm 0.04$ & $0.716\pm 0.04$ & $0.659\pm 0.05$ & $0.697\pm 0.05$ & $0.676\pm 0.05$ &
 $0.624\pm 0.05$ & $0.550\pm 0.06$ \\
NGC~6266    & $0.908\pm 0.03$ & $0.864\pm 0.03$ & $0.761\pm 0.04$ & $0.657\pm 0.06$ & $0.737\pm 0.03$ & $0.699\pm 0.03$ &
 $0.645\pm 0.04$ & $0.531\pm 0.06$\\
NGC~6273    & $0.812\pm 0.04$ & $0.761\pm 0.04$ & $0.635\pm 0.05$ & $0.543\pm 0.05$ & $0.658\pm 0.04$ & $0.634\pm 0.04$ &
 $0.563\pm 0.04$ & $0.482\pm0.05$\\
NGC~6287    & $0.794\pm 0.05$ & $0.755\pm 0.05$ & $0.677\pm 0.05$ & $0.597\pm 0.08$ & $0.649\pm 0.05$ & $0.622\pm 0.05$ &
 $0.571\pm 0.05$ & $0.517\pm0.07$\\
NGC~6293    & $0.793\pm 0.02$ & $0.766\pm 0.02$ & $0.716\pm 0.04$ & $0.643\pm 0.05$ & $0.677\pm 0.03$ & $0.608\pm 0.03$ &
 $0.536\pm 0.03$ & $0.486\pm0.05$\\
NGC~6325    & $0.962\pm 0.02$ & $0.938\pm 0.02$ & $0.809\pm 0.04$ & $0.682\pm 0.05$ & $0.788\pm 0.03$ & $0.754\pm 0.03$ &
 $0.665\pm 0.05$ & $0.590\pm0.06$\\
NGC~6333    & $0.778\pm 0.02$ & $0.741\pm 0.02$ & $0.665\pm 0.03$ & $0.611\pm 0.03$ & $0.669\pm 0.02$ & $0.633\pm 0.02$ &
 $0.588\pm 0.02$ & $0.527\pm0.02$\\
NGC~6355    & $0.912\pm 0.04$ & $0.864\pm 0.04$ & $0.748\pm 0.04$ & $0.664\pm 0.05$ & $0.725\pm 0.04$ & $0.693\pm 0.04$ &
 $0.642\pm 0.04$ & $0.580\pm0.05$\\
NGC~6401    & $0.985\pm 0.04$ & $0.935\pm 0.04$ & $0.851\pm 0.04$ & $0.758\pm 0.06$ & $0.825\pm 0.03$ & $0.790\pm 0.03$ &
 $0.723\pm 0.03$ & $0.641\pm0.04$\\
NGC~6558    & $0.876\pm 0.05$ & $0.841\pm 0.05$ & $0.760\pm 0.05$ & $0.671\pm 0.05$ & $0.802\pm 0.04$ & $0.777\pm 0.04$ &
 $0.706\pm 0.04$ & $0.626\pm0.04$\\
NGC~6626    & $0.886\pm 0.04$ & $0.826\pm 0.04$ & $0.707\pm 0.04$ & $0.618\pm 0.03$ & $0.744\pm 0.03$ & $0.705\pm 0.03$ &
 $0.623\pm 0.03$ & $0.564\pm0.04$\\
Terzan 4    & $0.769\pm 0.03$ & $0.727\pm 0.03$ & $0.650\pm 0.03$ & $0.579\pm 0.03$ & $0.650\pm 0.05$ & $0.616\pm 0.05$ &
 $0.547\pm 0.05$ & $0.477\pm0.05$\\
\hline
 \multicolumn{9}{c}{ \citet{Kim06}}  \\
\hline
NGC~6541    & $0.824\pm 0.02$ & $0.789\pm 0.02$ & $0.687\pm 0.02$ & $0.595\pm 0.02$ & $0.695\pm 0.02$ & $0.663\pm 0.02$ &
 $0.584\pm 0.02$ & $0.511\pm0.03$\\
NGC~6642    & $0.924\pm 0.03$ & $0.843\pm 0.03$ & $0.720\pm 0.03$ & $0.632\pm 0.04$ & $0.816\pm 0.03$ & $0.759\pm 0.03$ &
 $0.659\pm 0.03$ & $0.578\pm0.04$\\
NGC~6681    & $0.826\pm 0.02$ & $0.778\pm 0.02$ & $0.686\pm 0.02$ & $0.628\pm 0.02$ & $0.680\pm 0.03$ & $0.644\pm 0.03$ &
 $0.584\pm 0.03$ & $0.537\pm0.03$\\
NGC~6717    & $0.968\pm 0.03$ & $0.887\pm 0.03$ & $0.777\pm 0.03$ & $0.714\pm 0.03$ & $0.820\pm 0.02$ & $0.796\pm 0.02$ &
 $0.727\pm 0.02$ & $0.650\pm0.02$\\
NGC~6723    & $0.940\pm 0.02$ & $0.899\pm 0.02$ & $0.787\pm 0.03$ & $0.696\pm 0.03$ & $0.751\pm 0.03$ & $0.717\pm 0.03$ &
 $0.665\pm 0.04$ & $0.580\pm0.03$\\
\hline
\end{tabular}
\end{table}