As they age, the heads and legs become white and the fleece assumes a colour ranging from blue-grey to light grey.
Windows with the shutters and curtains closed show up in the images in a deep blue colour, demonstrating little heat is escaping.
This is used to generate a matte - which is transparent wherever the blue-colour features on the original film, and opaque elsewhere.
BBC: Blue and green-screen effects pioneer Petro Vlahos dies
Anthocyanins are plant pigments which colour red, purple and blue fruits and flowers.
BBC: A bumblebee extracting nectar and pollen from a snapdragon
Lakes are the colour of turquoise, so blue that you have to wonder if there is something unnatural behind their hue.
Rooms are styled in a nautical blue and white colour scheme.
German artist Katharina Fritsch's idea of a huge cockerel in ultramarine blue is aimed at injecting colour into the square.
In addition, star colour is simulated for noticeably red, blue and yellow stars, along with the changing brightness of three variable stars Algol, Mira and Delta Cephei.
Its famous spicy green chilli and blue corn tortillas will add a pop of colour to your palate.
Little lagoons, glassy blobs of brilliant blue water, punctuate the ride, pockets of sharp colour in barren nothingness.
Colour is added by using three separate arrays, each fitted with a filter for one of the primaries red, green and blue that, in combination, produce a full-colour image.
Apart from collecting prenatal pottery pieces (there seems to be no restriction against it), locals and tourists can enjoy a refreshing swim in the rolling, blue waves of the Black Sea -- so called for the colour of its deep waters densely populated with algae.
The Saint Lawrence, an almost constant by my side, seemed to change colour throughout the day, from choppy, muddy brown to a calm, silvery blue.
Blue and yellow tones work effectively but not red or green because of canine colour-blindness.
Bacteriorhodopsin has the habit of changing from blue to pale yellow in an electric field, which might be useful in colour displays.
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