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  2. Tint, shade and tone - Wikipedia

    en.wikipedia.org/wiki/Tint,_shade_and_tone

    When mixing colored light (additive color models), the achromatic mixture of spectrally balanced red, green, and blue (RGB) is always white, not gray or black. When we mix colorants, such as the pigments in paint mixtures, a color is produced which is always darker and lower in chroma, or saturation, than the parent colors. This moves the mixed ...

  3. Photochromic lens - Wikipedia

    en.wikipedia.org/wiki/Photochromic_lens

    A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state. Photochromic lenses may be made of polycarbonate, or another plastic. Glass lenses use visible light to darken.

  4. Gamma correction - Wikipedia

    en.wikipedia.org/wiki/Gamma_correction

    A CRT, for example, converts a video signal to light in a nonlinear way, because the electron gun's intensity (brightness) as a function of applied video voltage is nonlinear. The light intensity I is related to the source voltage V s according to , where γ is the Greek letter gamma.

  5. Blend modes - Wikipedia

    en.wikipedia.org/wiki/Blend_modes

    Linear Light: this blend mode combines Linear Dodge and Linear Burn (rescaled so that neutral colors become middle gray). Dodge is applied when the value on the top layer is lighter than middle gray, and burn applies when the top layer value is darker. The calculation simplifies to the sum of the bottom layer and twice the top layer, subtract 1.

  6. Change your emails font, format, hyperlinks, and more in AOL ...

    help.aol.com/articles/change-your-emails-font...

    Use the editor menu to change your font, font color, add hyperlinks, images and more. 1. Launch AOL Desktop Gold. 2. Sign on with your username and password.

  7. Chemical coloring of metals - Wikipedia

    en.wikipedia.org/wiki/Chemical_coloring_of_metals

    The color depends on voltage. Many other electrolytes can be used—even Coca-Cola. Straw yellow / 10V – violet / 29 V – blue / 30 V – blue green 45 V – light green / 55 V – purple-red / 75 V – grey / 110 V. It is mandatory that this process must be performed wearing rubber gloves (potentially dangerous voltage!). [35]