blue, green
青 centers on the blue-green range of the color spectrum, covering both blue and green as a single concept. In Japanese, it often refers to fresh, young, or verdant things.
青 originally depicted a plant growing from the ground, representing the color of vegetation. Over time, it came to denote the blue-green spectrum.
The top part looks like a sprouting plant, and the bottom 月 (moon) suggests the cool, fresh light of early morning. Together, 青 is the blue-green of new growth.
For セイ, imagine a clear blue-green sea: sea -> セイ, and the color of the water is 青.
blue; azure
blue; azure
youth; adolescence; springtime of life
youth; young man
lush mountain; green mountain
Japanese laurel (Aucuba japonica); spotted laurel
blue sky
blue
fresh leaves
young people; youth; the younger generation
unripe plum
paint
green willow (i.e. one that has budded)
deep blue; bright blue
pale; pallid
fruits and vegetables; produce
bronze
to become pale; to turn pale
blueprint; cyanotype
hydrocyanic acid; prussic acid; hydrogen cyanide
blue sky
verdigris; green rust; copper rust
speculatively buying a rice harvest, while the fields are still green
young persons' association