The term 'deep violet blue' is a combination of two colors, INDIGO and violet. INDIGO is a deep, dark blue color that is often associated with royalty and luxury. It is also the color of the sky at twilight. Violet is a bright, vibrant purple color that is often associated with creativity and imagination. When combined, these two colors create a unique hue that is both deep and vibrant. This color is often used in fashion and interior design to create a luxurious and sophisticated look.