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In formal color theory, purple colors often refer to the colors on the line of purples on the CIE chromaticity diagram (or colors that can be derived from colors on the line of purples), i.e., any color between red and violet, not including either red or violet themselves.
Tones of violet tending towards the blue are called indigo. Purple colors are colors that are various blends of violet or blue light with red light.
The tertiary color on the HSV color wheel (also known as the RGB color wheel) precisely halfway between blue and magenta is called color wheel violet. This tone of violet—an approximation of the color violet at about 417 nanometers as plotted on the CIE chromaticity diagram —is shown at right.
In many American, Canadian, New Zealand and Australian hospitals, for example "code blue" indicates a patient has entered cardiac arrest, while "code red" indicates that a fire has broken out somewhere in the hospital facility.
Color name chart. The following chart presents the standardized X11 color names from the X.org source code. The list of names accepted by browsers following W3C standards slightly differs as explained above. The table does not show numbered gray and brightness variants as described below.
Colors in the chart below are approximated. The hex RGB values are in the order of the predominant color and then the flecks. Colors for crayons other than Mixed Veggies and Star Spangled Banner come from information on the crayon wrapper.
Hue relationships between the primary and secondary colors in the ISCC-NBS system of color designation. The ISCC–NBS System of Color Designation is a system for naming colors based on a set of 13 basic color terms and a small set of adjective modifiers.
The first letter of the color code is matched by order of increasing magnitude. The electronic color codes, in order, are: 0 = Black; 1 = Brown; 2 = Red; 3 = Orange; 4 = Yellow; 5 = Green; 6 = Blue; 7 = Violet; 8 = Gray; 9 = White; Easy to remember. A mnemonic which includes color name(s) generally reduces the chances of confusing black and brown.
The Munsell color system, showing: a circle of hues at value 5 chroma 6; the neutral values from 0 to 10; and the chromas of purple-blue (5PB) at value 5. In colorimetry , the Munsell color system is a color space that specifies colors based on three properties of color: hue (basic color), value ( lightness ), and chroma (color intensity).
RYB color model. An RYB color chart from George Field 's 1841 Chromatography; or, A treatise on colours and pigments: and of their powers in painting. The 1613 RYB color scheme of Franciscus Aguilonius (Francisci Agvilonii), with primaries yellow (flavus), red (rubeus), and blue (caeruleus) arranged between white (albus) and black (niger), with ...