On reading the prompt for the Cosmic Photo Challenge: Pick a Colour I immediately thought of blue. In part because when I read the prompt I was picking photos for the Friendly Friday Photo Challenge: Yellow and blue is the complimentary colour to yellow.
I suspect that another reason for thinking blue was because of the blue, yellow and red butterfly garden ornaments I walk past on some of my walks around the neighborhood and that I have been taking photos of for the past few winters.

Blue on blue. The giant blue butterfly garden ornament against a blue sky taken on a walk around the neighborhood last week.

Blue rain. Or at least raindrops on the roof of a blue car.

Blue aluminium. Knurled aluminium anodized blue on the body of a small torch (flashlight).

Blue dawn. A 60 second exposure at dawn allows the clouds to move across the sky over Colpoy’s Bay.

Blue ripples. The blue sky reflected in the ripples on Georgian Bay, Ontario.

Blue in the snow. The giant blue butterfly garden ornament in the snow last autumn.