Cerulean is a blue hue that covers the colors between blue and cyan. It's a dreamy color that is calming and steadfast, which is why we're showing you mostly bedding and bathroom items. Blues calm you, which is always nice in a bedroom or bathroom. The world cerulean actually comes from Latin word caelum, which means 'heaven, sky.' This color can be used playfully, calmly, seriously, and basically any way you can imagine! Sweet dreams, readers!