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Blue hour at the Old Cathedral of the Holy Name of Jesus, Bragança in Portugal. The blue hour (from French l'heure bleue; [1] [a] pronounced [lœʁ blø]) is the period of twilight (in the morning or evening, around the nautical stage) when the Sun is at a significant depth below the horizon.
The violet sabrewing is the largest hummingbird of Mexico and Central America.It is 13 to 15 cm (5.1 to 5.9 in) long and weighs 9 to 12 g (0.32 to 0.42 oz). Both sexes have a black bill, though those of subspecies C. h. mellitus are longer than the nominate's.
Light blue stripes denote one Independent senator (who caucuses with the Democrats). All states contain considerable numbers of both liberal and conservative voters (i.e., they are "purple") and only appear blue or red on the electoral map because of the winner-take-all system used by most states in the Electoral College. [4]
A blue rose is a flower of the genus Rosa (family Rosaceae) that presents blue-to-violet pigmentation instead of the more common red, white, or yellow, through use of artificial means such as dyes. Blue roses are often used to symbolize mystery or the unattainable, [ 1 ] since they do not exist in nature because of genetic limitations.
Clitoria ternatea, commonly known as Asian pigeonwings, [1] bluebellvine, blue pea, butterfly pea, cordofan pea or Darwin pea, [2] is a plant species belonging to the family Fabaceae, endemic and native to the Indonesian island of Ternate.
Tekhelet (Hebrew: תְּכֵלֶת təḵēleṯ; alternative spellings include tekheleth, t'chelet, techelet, and techeiles) is a highly valued dye described as either "sky blue" (Hebrew: תּכוֹל, romanized: tāk̲ol, lit.
The blue-and-yellow macaw (Ara ararauna), also known as the blue-and-gold macaw, is a large Neotropical parrot with a mostly blue dorsum, light yellow/orange venter, and gradient hues of green on top of its head.
Victoria blue dyes are related to the methyl violet dyes, except they contain one naphthylamino group. Variation is found is dimethylamine vs diethylamino substituents on the phenyl rings and variations of the secondary amine on the naphthyl group.