What contrast do you need on a terrace and at night?

You need a light mark on a dark ground, or the reverse, readable in terrace sun and in street light at night. A grey on beige that looks refined on screen does not exist outside. Take the proof onto the terrace at noon and photograph it again at dusk, without flash. If you have to squint, there is not enough contrast. On Madrid terraces a menu in white on a pale photo cannot be read, and at night the thin sign goes dark. People shout for what the paper does not say. Two approved contrast versions, day and night, and the menu file with the background that holds in the sun. The sheet bans grey text on a photo.