"The Annunciation" by Doménikos Theotokópoulos called El Greco. Mary wearing a silvery red robe and a blue cloak stands opposite an angel wearing a yellow wrap skirt. Above them the heavens open, and a white dove descends
The Opening of the Fifth Seal, by El Greco. St. John, arms raised, clad in silvery blue in front of a group of unclothed humans. There are green and yellow cloaks being draped over them. Again a very dramatic sky.
The painting "View of Toledo" by El Greco. The city of Toledo in Castille, Spain is depicted in a silvery-blue colour against the green hills and the magnificent sky in hues of blue, white and grey
And of course the works of El Greco: