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Alternatively, full control over the opacity of any color can be made by adding two further hex digits to any six-hexadecimal-digit colour. The last two will create an opacity of 0% (00) through to 100% (FF) If no valid color is specified the color will be set to a default of 'hard grey'
The typical range of intensity values for each color, 0–255, is based on taking a binary number with 32 bits and breaking it up into four bytes of 8 bits each. 8 bits can hold a value from 0 to 255. The fourth byte is used to specify the "alpha", or the opacity, of the color. Opacity comes into play when layers with different colors are stacked.
In cases where the alpha is not used this can be shortened to 6 digits RRGGBB, this is why it was chosen to put the alpha in the top bits. Depending on the context a 0x or a number sign (#) [2] is put before the hex digits. This layout became popular when 24-bit color (and 32-bit RGBA) was introduced on personal computers.
The edges of characters and other images with transparent background should not have shades of gray: these are normally used for intermediate colors between the color of the letter/image and that of the background, typically shades of gray being intermediate between a black letter and a white background. However, with, for example, a red ...
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.
All the color parameters can either use the color names in the table above, or use hex triplets (e.g. #FF0000), as described at Web colors. If using hex, a further two digits can optionally set opacity. Default = dark red. shape-outline sets several different outline attributes: color,line-thickness,opacity,css-style. (line-thickness is in px ...
To use a colour in a template or table you can use the hex triplet (e.g. bronze is #CD7F32) or HTML color names (e.g. red). Editors are encouraged to make use of Brewer palettes for charts, maps, and other entities, using this tool .
Often known as truecolor and millions of colors, 24-bit color is the highest color depth normally used, and is available on most modern display systems and software. Its color palette contains (2 8) 3 = 256 3 = 16,777,216 colors. 24-bit color can be represented with six hexadecimal digits.