What color is used for the catering billboard? You need to consider what kind of main color is used for the catering brand you are making.

if there is no requirement for this, I suggest you use: red background+white characters (or bright yellow) and don't make them too small.

According to my actual use, I think red is the most penetrating.

Can you have a look at KFC? The background color is red and the words are white.

and McDonald's? The background color is dark red and the characters are bright yellow.