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Viola sororia (/ v aɪ ˈ oʊ l ə s ə ˈ r ɔːr i ə / vy-OH-lə sə-ROR-ee-ə), [5] known commonly as the common blue violet, is a short-stemmed herbaceous perennial plant native to eastern North America. It is known by a number of common names, including common meadow violet, purple violet, woolly blue violet, hooded violet, and wood ...
In optics, violet is a spectral color: It refers to the color of any different single wavelength of light on the short wavelength end of the visible spectrum (between approximately 380 and 435 nanometers), [16] [17] whereas purple is the color of various combinations of red, blue and violet light, [5] [6] some of which some humans perceive as ...
Viola cucullata, the hooded blue violet, marsh blue violet or purple violet, is a species of the genus Viola native to eastern North America, from Newfoundland west to Ontario and Minnesota, and south to Georgia. [1] It is a recipient of the Royal Horticultural Society's Award of Garden Merit. [2]
If defined as blue-dominated colors between blue and red, violet colors in Munsell's system would be classified as having the 7.5PB and 10.0PB hue, which is confirmed in visual experiments [6] The truly purple color, defined as being within the range of the red-dominated colors between red and blue, is sometimes confusingly labeled as red ...
It is known that acidification of soil can cause change of the hydrangea flower colour from red/pink to blue/violet. Explanation of this phenomenon we can find in the molar ratio of co-pigment (acylquninic acid) to anthocyanin, which is much higher in the blue cells, also the level of Al3+ ions is higher in the blue flowers.
The web color violet is actually a rather pale tint of magenta because it has equal amounts of red and blue (the definition of magenta for computer display), and some of the green primary mixed in, unlike most other variants of violet that are closer to blue. This same color appears as "violet" in the X11 color names.
This can only be used as a very rough guide, for instance if a narrow range of wavelengths within the band 647–700 nm is absorbed, then the blue and green receptors will be fully stimulated, making cyan, and the red receptor will be partially stimulated, diluting the cyan to a greyish hue.
The colour of the hyacinth flower ranges from violet blue to a bluish purple (though the hyacinth species dominant in the eastern Mediterranean, Hyacinthus orientalis, is violet [25]), and the word hyakinthos was used to describe both blue and purple colours. [25] Early rabbinic sources provide indications as to the nature of the colour.