# Mind your C's and D's

$\begin{array} {c c c } & & \color{#20A900}{C} \\ + & \color{#20A900}{C} & \color{#20A900}{C} \\ \hline & \color{#69047E}{D} & 4 \\ \end{array}$

In the above cryptogram, $\color{#20A900}{C}$ and $\color{#69047E}{D}$ represent distinct digits. What is the value of $\color{#20A900}{C}$?

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