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  2. Color space - Wikipedia

    en.wikipedia.org/wiki/Color_space

    Color space conversion is the translation of the representation of a color from one basis to another. This typically occurs in the context of converting an image that is represented in one color space to another color space, the goal being to make the translated image look as similar as possible to the original.

  3. Red states and blue states - Wikipedia

    en.wikipedia.org/wiki/Red_states_and_blue_states

    These "purple maps" are useful for showing the highly mixed nature of voting, but are extremely difficult to interpret in detail. The lack of clear classes make these purple maps prone to the problems of color perception described above. However, there are pros and cons to both classified and unclassified choropleth maps.

  4. Subtractive color - Wikipedia

    en.wikipedia.org/wiki/Subtractive_color

    Subtractive color or subtractive color mixing predicts the spectral power distribution of light after it passes through successive layers of partially absorbing media. This idealized model is the essential principle of how dyes and pigments are used in color printing and photography, where the perception of color is elicited after white light ...

  5. Han purple and Han blue - Wikipedia

    en.wikipedia.org/wiki/Han_Purple_and_Han_Blue

    Color. Azurite was the only natural blue pigment used in early China. Early China seems not to have used a natural purple pigment and was the first to develop a synthetic one. Han blue in its pure form is, as the name suggests, blue. Han purple in its pure form is actually a dark blue, that is close to indigo.

  6. Heliotrope (color) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(color)

    CIELCh uv ( L, C, h) (66, 102, 295°) Source. Maerz and Paul [1] ISCC–NBS descriptor. Vivid purple. B: Normalized to [0–255] (byte) Heliotrope is a pink - purple tint that is a representation of the colour of the heliotrope flower . The first recorded use of heliotrope as a color name in English was in 1882.

  7. SMPTE color bars - Wikipedia

    en.wikipedia.org/wiki/SMPTE_color_bars

    SMPTE ECR 1-1978 (SDTV) In a SMPTE color bar image, the top two-thirds of the television picture contain seven vertical bars of 75% intensity. In order from left to right, the colors are white or gray, yellow, cyan, green, magenta, red, and blue. [18] The choice of white or gray depends on whether that bar's luminance is 100% or not.

  8. Color vision - Wikipedia

    en.wikipedia.org/wiki/Color_vision

    Color vision. Colorless, green, and red photographic filters as imaged by camera. Color vision, a feature of visual perception, is an ability to perceive differences between light composed of different frequencies independently of light intensity. Color perception is a part of the larger visual system and is mediated by a complex process ...

  9. HSL and HSV - Wikipedia

    en.wikipedia.org/wiki/HSL_and_HSV

    The resulting mixtures in RGB color space can reproduce a wide variety of colors (called a gamut); however, the relationship between the constituent amounts of red, green, and blue light and the resulting color is unintuitive, especially for inexperienced users, and for users familiar with subtractive color mixing of paints or traditional ...