1, the same color system is: light blue with white, light blue with dark blue, which feels clean and neat; Light blue with lavender, light blue with light yellow, dark blue with purple, feeling romantic; Light blue with turquoise, light blue with blue purple, feeling full of hope.

2. The combination of blue, white and red is the most beautiful visual effect, so many trademarks and national flags use this combination. Blue and yellow are contrasting colors, and the contrasting colors are more eye-catching. However, in practical application, it will not be directly matched with solid colors, which makes people feel stiff. Generally, the matching of complementary colors or over-matched contrasting colors will give people a sense of relief, and there will be no feeling of visual jumping.

3, blue with red makes people look charming and handsome, but pay attention to the appropriate proportion of blue and red.