Blue has a wide range of uses, blue can calm the mood, and sky blue can be used as decoration for hospitals and sanitary equipment, or summer clothing, curtains, etc. In general paintings and all kinds of accessories, blue is also inseparable.
Different blues and whites match, showing bright, refreshing and clean; blues match yellows, with a large contrast and more lively; big blues generally do not match greens, they can only penetrate each other and become blue-green, Lake blue or cyan, this is also an intoxicating color; light green and black match, it looks solemn, mature and cultivated.