blue

She decided to paint her bedroom walls a light shade of blue.

(Chinese) 她决定把卧室墙壁涂成浅蓝色。

The clear water of the tropical lake was a brilliant blue.

(Chinese) 热带湖泊清澈的水呈明亮的蓝色。

I've been feeling a bit blue since my best friend moved away.

(Chinese) 自打我最好的朋友搬走后，我一直觉得有点忧郁。

Rainy Mondays always make me feel blue and unmotivated.

(Chinese) 下雨的周一总是让我感到沮丧，没有动力。