Aqua/ˈɑːkwə/ Definition 1 of 4Pro Tip 1/3Color Specificity Aqua describes a specific greenish-blue shade, similar to the color of tropical waters. The aqua curtains gave the room a tropical feel. Pro Tip 2/3Fashion and Design Use 'aqua' when discussing colors in fashion and interior design to sound more sophisticated. The designer recommended aqua accents for a beachy vibe. Pro Tip 3/3Visual Imagery 'Aqua' evokes images of clear, clean water and freshness, often used in marketing. The spa's aqua branding suggested purity and cleanliness.