67 of 100: Tram O'Rama

$\begin{array} {ccccc} \large & & \color{#D61F06}M & \color{#20A900}A & \color{#3D99F6}R & \color{#69047E}T\\ \large + & &\color{#69047E}T & \color{#3D99F6}R& \color{#20A900}A & \color{#D61F06}M \\ \hline \large & & \color{#3D99F6}R & \color{#20A900}A & \color{#D61F06}M & \color{#20A900}A \end{array}$

If each letter represents a different nonzero digit, what is $\color{#D61F06}M\color{#333333}?$

Another tough, algebraic cryptogram puzzle!