The formal dress is informal, and casual wear is often not allowed.

The formal dress is formal, but its color is regulated.

The 1 color principle is the basic principle of choosing formal colors.

Its meaning is that the color of formal dress should be less suitable in general, so it is best to control it in three colors.

In doing so, it helps to maintain the solemn and conservative style of formal dress, and make the dress regular, concise and harmonious in color.

If the color of formal dress exceeds three colors, it will give people a sense of complexity and vulgarity.

(2) the basic colors of the dress are usually monochrome and dark, and should not be patterned.

The most standard sets of colors are blue, gray, brown and black.

The colors of shirts are best white, leather shoes, socks and briefcases should be dark and black.

If the colors of the formal dress are multicolored, rich colors and fancy patterns, they will cause "qualitative change" and make people look up.

This is especially important for men.