What contrast do you need at night?
At night you need dark text on a light ground, or the reverse with a hard jump, tested on the table and not on the screen. A tasteful grey is useless if by candlelight the price disappears.
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Sit at the worst-lit table with a printed proof. The light grey that looked right on the laptop cannot be read on the second sitting. You get the menu adjusted to the contrast that was read at that table, with ground and text noted.