Blue (Single Colour)

Brief

The United Nations General Assembly adopted the resolution to hold an International Day of Clean Air for blue skies on September 7th, 2020. In reverence to the colour blue, please submit your photos where blue is the only colour. A bit of black, grey and/or white is acceptable but absolutely no other colour except for the colour blue. Feel free to choose any subject you wish. I am looking forward to see you entries.