Hướng dẫn mã màu css w3school
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Colors are displayed combining RED, GREEN, and BLUE light. Show Color NamesWith CSS, colors can be set by using color names: CSS Color ValuesWith CSS, colors can be specified in different ways:
RGB ColorsRGB color values are supported in all browsers. An RGB color value is specified with: rgb( RED , GREEN , BLUE ). Each parameter defines the intensity of the color as an integer between 0 and 255. For example, rgb(0,0,255) is rendered as blue, because the blue parameter is set to its highest value (255) and the others are set to 0. Example
Try it Yourself » Shades of gray are often defined using equal values for all the 3 light sources: Example
Try it Yourself » Hexadecimal ColorsHexadecimal color values are also supported in all browsers. A hexadecimal color is specified with: #RRGGBB. RR (red), GG (green) and BB (blue) are hexadecimal integers between 00 and FF specifying the intensity of the color. For example, #0000FF is displayed as blue, because the blue component is set to its highest value (FF) and the others are set to 00. Example
Try it Yourself » Shades of gray are often defined using equal values for all the 3 light sources: Example
Try it Yourself » Upper Case or Lower Case?You can use upper case or lower case letters to specify hexadecimal values. Lower case are easier to write. Upper case are easier to read. Color NamesCSS supports 140 standard color names. In the next chapter you will find a complete alphabetical list of color names with hexadecimal values:
The currentcolor KeywordThe ExampleThe border color of the following element will be blue, because the text color of the element is blue:
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