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Fragment of an Apple II computer screen, showing the actual pixel data composed of vertical stripes (top) and the resulting colors when seen on an NTSC TV (bottom) Color graphics on the Apple II uses a quirk of the NTSC television signal standard, which made color display relatively easy and inexpensive to implement.
The RGB color model is an additive color model [1] in which the red, green, and blue primary colors of light are added together in various ways to reproduce a broad array of colors. The name of the model comes from the initials of the three additive primary colors , red, green, and blue.
Systems with a 3-bit RGB palette use 1 bit for each of the red, green and blue color components. That is, each component is either "on" or "off" with no intermediate states. This results in an 8-color palette ((2 1 ) 3 == 2 3 == 8) that have black, white, the three RGB primary colors red, green and blue and their correspondent complementary ...
Low-resolution colors 0 (black), 3 (purple), 6 (medium blue), 9 (orange), 12 (light green) and 15 (white) were also available in high-resolution mode. Colors 5 and 10 (gray) are indistinguishable on original hardware; however, some emulators (such as older AppleWin versions) display them as different shades. Note that some of the AppleWin ...
Violet light has a wavelength between approximately 380 and 435 nanometers. [2] The color's name is derived from the Viola genus of flowers. [3] [4] In the RGB color model used in computer and television screens, violet is produced by mixing red and blue light, with more blue than red.
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 , and chroma (color intensity).
The left half shows the photo as it came from the digital camera. The right half shows the photo adjusted to make a gray surface neutral in the same light. In photography and image processing, color balance is the global adjustment of the intensities of the colors (typically red, green, and blue primary colors). An important goal of this ...
A comparison between a typical normalized M cone's spectral sensitivity and the CIE 1931 luminosity function for a standard observer in photopic vision. In the CIE 1931 model, Y is the luminance, Z is quasi-equal to blue (of CIE RGB), and X is a mix of the three CIE RGB curves chosen to be nonnegative (see § Definition of the CIE XYZ color space).