Aquamarine is a color that is a bluish tint of cerulean toned toward cyan. It is known as being the color of sea foam green. Although Aqua is more to the green spectrum, Aquamarine is a more deep green, perhaps a darker color of Aqua. It is named after the mineral aquamarine, a gemstone mainly found in granite rocks. The first recorded use of aquamarine as a color name in English was in 1598.