The color of water (as seen in rivers, lakes, the sea) — typically a pale blue or aqua shade.
窓の外の水色の海がとても美しかった。
The pale-blue sea outside the window was very beautiful.
夏には水色のワンピースがよく似合う。
A light-blue dress suits you well in summer.
絵の具で水色を作るのは簡単だ。
It's easy to mix a water-blue color with paint.
A poetic or literary sense referring to waterside scenery (rivers, lakes, etc.).
歌人は水色の風景を短歌に詠んだ。
The poet composed a tanka about the waterside scenery.
画家は画布に広がる水色の情景を描いた。
The painter depicted a water-scape spread across the canvas.
Light blue; pale blue; aqua — a common color name (readings include 'sui-shoku' and colloquially 'mizuiro').
子どもの部屋を水色の壁紙で明るくした。
I brightened the child's room with pale-blue wallpaper.
そのネクタイは水色で、とても爽やかに見える。
That tie is light blue and looks very fresh.
水色のペンを使ってノートを整理した。
I organized my notes using a light-blue pen.