surname Lan

blue; indigo plant

blueprint

blueberry

blues (music)

blue sky

blue-collar; blue-collar worker

sapphire

cabbage; Chinese broccoli; gai larn

Blu-ray (disc format)

azure; sky-blue

blue whale

the Smurfs

the Blue Planet; planet Earth

dark blue

bright blue

Buddhist temple (loanword from Sanskrit "samgharama")

pinkish blue

sky blue

sapphire blue

light blue

Deep Blue, chess-playing computer, first to defeat reigning world champion, developed by IBM (1985-1997)

dark blue

azure

(usu. of the sky) azure; bright blue

dark blue

methylene blue

Chinese broccoli; Chinese kale; cabbage mustard; Brassica oleracea var. alboglabra; also pr. [jie4 lan2]

kohlrabi (Brassica oleracea)

Isatis tinctoria (woad, a brassica producing blue dye)

(Tw) John Lennon (1940–1980), English singer, guitarist, and songwriter

see 藍山縣|蓝山县[Lan2 shan1 Xian4]

blue topaz; topaz (aluminum fluorosilicate)

blueprint; source material on which later works (books, movies etc) are based

(neologism) an unexplored, as yet uncontested market (contrasted with 紅海|红海[hong2 hai3])

Bluetooth

see 藍田縣|蓝田县[Lan2 tian2 Xian4]

blue shift (astronomy)

variant of 襤褸|褴褛[lan2 lu:3]

Cyanobacteria (blue-green algae)

cyanobacterium (blue-green alga)

indigo

(bird species of China) slaty bunting (Emberiza siemsseni)

(bird species of China) Swinhoe's pheasant (Lophura swinhoii)

indigo dye; Polygonum tinctorium

indigo (dye)

azure

cloisonne; cloisonné

indigo woad root; root of Isatis tinctoria (used in TCM)