蓝色 (lán sè) means “blue” | MotiTan Chinese Dictionary

More examples

他今天穿着蓝色的衬衫。tā jīn tiān chuān zhe lán sè de chèn shān

He is wearing a blue shirt today.

A band of color from the light blue of the sky to the deep blue of water, including indigo.

天蓝色tiān lán sè: A light, pale blue close to the color of a clear sky.
深蓝色shēn lán sè: A dark, rich blue color.

指接近天蓝或深蓝的颜色，用于描述事物的颜色。zhǐ jiē jìn tiān lán huò shēn lán de yán sè yòng yú miáo shù shì wù de yán sè

蓝 (lán, "indigo dye") + 色 (sè, "color") names the blue color associated with the plant dye once used to color cloth.

The exact shade covered by 蓝色 (lánsè, "blue") often comes from the object or picture being discussed, so a classroom color label need not identify one precise shade.