\usepackage {colortbl}
\begin{tabular}{lrr}
  \color{green}
       \large\textbf{Table title}\\[3mm]
  \textbf{Description}
           & \textbf{Column 1}
              & \textbf{Column 2}\\[1mm]
  Row one  & mmmmm & mmmm  \\
  Row two  &  mmmm & mmm   \\
  Row three& mmmmm & mmmmm \\
  Row four & mmmmm & mmmm  \\
\cline{2-3}
  \color{green} Totals
           & \color{green} mmmmm
             & \color{green}mmmmm
\end{tabular}