藍 - indigo

dyer's knotweed (Persicaria tinctoria, used to produce indigo dye)

any shark of genus Centrophorus (esp. the dwarf gulper shark, Centrophorus atromarginatus)

blotched foxface (Siganus unimaculatus)

pale cyan; pale azure

indigo blue

natural indigo

blue iron earth

temple (esp. large one); monastery

pelican

indigo dye

surpassing one's master

violet tinged with indigo