What color does the gray background and signboard match?

Gray background with sapphire blue signboard looks good, gray background with dark green signboard looks good, gray background with grass green signboard looks good, gray background with Kong Quelan signboard looks good, gray background with big red signboard looks good, and gray background with yellow characters with red edges also looks good and conspicuous.

1.

You can choose red characters at the bottom of the dark gray plaque, which is more conspicuous. Dark gray and red are matching colors, red is lively and atmospheric, and dark gray is steady and quiet. So the matching effect of these two colors is very beautiful.

2.

Dark gray plaques decorated with white words can also be paired with black D. Or choose lake blue and army green. The color background can be matched with the red text. Red and gray are matching colors, which can set off the black atmosphere and the conspicuous nobility of red.