осмон: sky
Her eyes were bright blue like the clear sky.
Борон монда, осмон оҳиста-оҳиста равшан шуд.
The rain stopped, and the sky slowly became bright.
Bonus:
осмонранг: sky-blue colour
осмонӣ: of the sky, celestial
ҷирми осмонӣ: celestial body (planet, for example)
осмони соф: clear sky
осмонбӯс: very high (mountains, for example)
осмон баланд, замин сахт: the sky is high, the ground is hard (said when you are in a difficult situation that has no easy solution)