30. There are 700 cards of 6 different colors: red, orange, yellow, green, blue, and white in a box. The ratio of the number of red, orange, and yellow cards is $1: 3: 4$, and the ratio of the number of green, blue, and white cards is 3:1:6. It is known that there are 50 more yellow cards than blue cards. How many cards must be drawn to ensure that at least 60 cards of the same color are drawn?
\begin{tabular}{c}
\hline $\mathbf{3 0}$ \\
\hline 312
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