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  2. RGBA color model - Wikipedia

    en.wikipedia.org/wiki/RGBA_color_model

    RGBA stands for red green blue alpha. While it is sometimes described as a color space , it is actually a three-channel RGB color model supplemented with a fourth alpha channel . Alpha indicates how opaque each pixel is and allows an image to be combined over others using alpha compositing , with transparent areas and anti-aliasing of the edges ...

  3. Transparency (graphic) - Wikipedia

    en.wikipedia.org/wiki/Transparency_(graphic)

    GIF animation of an Apollonian sphere packing with transparent background. Transparency in computer graphics is possible in a number of file formats.The term "transparency" is used in various ways by different people, but at its simplest there is "full transparency" i.e. something that is completely invisible.

  4. Computer Originated World - Wikipedia

    en.wikipedia.org/wiki/Computer_Originated_World

    The Computer Originated World itself is a semi-transparent blue globe with golden continents and gold "BBC1" legend located below the globe in a font similar to that used in the early days of the BBC. The globe revolved at a steady pace throughout, and had the effect of a spotlight added to the surface.

  5. Alpha compositing - Wikipedia

    en.wikipedia.org/wiki/Alpha_compositing

    A color spectrum image with an alpha channel that falls off to zero at its base, where it is blended with the background color.. In computer graphics, alpha compositing or alpha blending is the process of combining one image with a background to create the appearance of partial or full transparency. [1]

  6. Blue in culture - Wikipedia

    en.wikipedia.org/wiki/Blue_in_culture

    It made a fine transparent blue valued in medieval manuscripts. [30] Another common blue pigment was smalt, which was made by grinding blue cobalt glass into a fine powder. It made a deep violet blue similar to ultramarine, and was vivid in frescoes, but it lost some of its brilliance in oil paintings.

  7. Web colors - Wikipedia

    en.wikipedia.org/wiki/Web_colors

    A hex triplet is a six-digit (or eight-digit), three-byte (or four-byte) hexadecimal number used in HTML, CSS, SVG, and other computing applications to represent colors.The bytes represent the red, green, and blue components of the color.

  8. Transparency and translucency - Wikipedia

    en.wikipedia.org/wiki/Transparency_and_translucency

    Photons interact with an object by some combination of reflection, absorption and transmission. Some materials, such as plate glass and clean water, transmit much of the light that falls on them and reflect little of it; such materials are called optically transparent. Many liquids and aqueous solutions are highly transparent.

  9. RGB color model - Wikipedia

    en.wikipedia.org/wiki/RGB_color_model

    where # equals the proportion of red, green, and blue respectively. This syntax can be used after such selectors as "background-color:" or (for text) "color:". Wide gamut color is possible in modern CSS, [29] being supported by all major browsers since 2023. [30] [31] [32] For example, a color on the DCI-P3 color space can be indicated as: