Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour model. It lies between violet and green on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called Tyndall effect explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective. Blue has been an important colour in art and decoration since ancient times. The semi-precious stone lapis lazuli was used in ancient Egypt for jewellery and ornament and later, in the Renaissance, to make the pigment ultramarine, the most expensive of all pigments.
| Wavelength | approx. 450–495 nm |
| Frequency | ~670–610 THz |
| Hex triplet | #0000FF |
| Source | HTML/CSS |
About Blue
Web series about a single mother with a secret life as a sex worker. She'll do anything to keep her double life from her teenage son.
Achievement of Blue
The series won several accolades, including a Satellite Award nomination in 2013.
Top Facts You Did Not Know About Blue
Blue Meanings.. Blue Screen of Death - A stop error or exception error, commonly called the blue screen of death or blue screen, is an error screen displayed on Windows computers following a fatal system error. It indicates a system crash, in which the operating system has reached a condition where it can no longer operate safely.. Blue (university sport) - A blue is an award of sporting colours earned by athletes at some universities and schools for competition at the highest level. The awarding of blues began at Oxford and Cambridge universities in England.. Engineer's blue - Engineer's blue is a highly pigmented paste used to assist in the mating of two or more components.. Lists of colors - These are the lists of colors; • List of colors: A–F • List of colors: G–M • List of colors: N–Z • List of colors • List of colors by shade • List of color palettes • List of Crayola crayon colors • List of RAL colors • X11 color names.. Non-photo blue - Non-photo blue is a common tool in the graphic design and print industry, being a particular shade of blue that cannot be detected by graphic arts camera film. This allows layout editors to write notes to the printer on the print flat which will not show in the final form.. Optical spectrum.. Web colors.. Shades of blue.
