of the colour of the sky without clouds on a bright day, or a darker or lighter type of this
Her hands were blue with cold (= slightly blue because of the cold).
The sky was a brilliant shade of blue on a clear summer day, with not a cloud in sight.
She decided to paint her bedroom walls a soothing light blue to create a relaxing and tranquil atmosphere.
His eyes sparkled with a deep blue hue, making them one of his most striking features.
