Here, it explains how to change the color of the choice button.
(1)Click the setting button on the upper right of the management page.
(2)Click [Chat]>[Design]>[Template] on the left side of the screen.
(3)Click [Detailed setting] at the bottom right of the screen.
(4)Choose the color of [choice background], [background's color when the choice is hovering], [background color of choices after clicked], [color of letters in choices], and [color of letters in choices after clicked].