Ruby 1.9.3 リファレンスマニュアル > ライブラリ一覧 > cursesライブラリ > Cursesモジュール > start_color
start_color -> bool
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Initializes the color attributes, for terminals that support it.
This must be called, in order to use color attributes. It is good practice to call it just after Curses.init_screen