深蓝色英语可以翻译为"dark blue"。它的来源可能是指深蓝色在色彩中的位置。例如：

The walls of the room were painted a deep blue. (房间的墙壁被涂成了深蓝色。)

She wore a dark blue dress to the party. (她穿着深蓝色的裙子参加聚会。)

The sky was a deep blue in the evening. (傍晚的天空是深蓝色的。)

希望这些例句能帮助您。