what flowers are navy blue?
['Blue hydrangea: Blue hydrangea is an absolute breathtaking flower. ... ', 'Delphinium: Delphinium flowers come in some of the truest shades of blue colour. ... ', 'Dandelion: ... ', 'Grape Hyacinth: ... ', 'Clematis: ... ', 'Bluestar: ... ', 'Bellflower: ... ', 'Balloon Flower:']