In brief
Hard sweet peppers are suitable for salads and sandwiches. A clear distinction of sweet and spicy varieties is part of the choice.
Useful to know
For raw use, choose sweet peppers with a bright color and a hard surface, without brown or soft areas. The University of Iowa lists slices for vegetable plateaus, salads, sandwiches, and wraps. [1]
Before preparation, rinse under running water and dry. Remove the handle and seed part according to the chosen cutting method. For a sandwich, thin strips are arranged differently than mixed salad cubes; this is a choice according to the portion.
The source examines bell peppers, that is, sweet peppers. Don't automatically transfer the description to each chili pepper just because of the color. If you're buying an unknown variety, check its purpose and luminosity separately.
When storing, use a refrigerator and a suitable envelope according to university guidelines. [1] Do not buy a large quantity solely because of the different colors, if the recipes for the week require only a small part of it.
Sources
For further detail and to check the information: