淡紅 is read as たんこう (tankou) and means pink.
たんこう
tankou
たんこうしょく
pink
たんぱく
light (flavor, color, etc.)
あわい
light
たんすい
fresh water (i.e. not salt water)
たんたん
flowing gently
たんすいぎょ
freshwater fish
たんすいか
desalination
たんすいかぷらんと
desalination plant
たんすいさん
freshwater
あわじようごがっこう
Awaji Special Needs School (older name style)
たんげつ
faint moon
あわじむすび
var. of knot often used to tie mizu-hiki