The color attribute defines text or background color in CSS and can be specified in a variety of formats, including hexadecimal values, RGB values, RGBA values, HTML color names, HSL and HSLA values, and keywords such as currentColor , inherit, transparent).
The meaning of color in CSS
The color property defines the color of the text or background of an element in CSS. It is specified in various formats, including:
Hexadecimal value
A hexadecimal value is a six-digit number starting with a pound sign (#) Code that represents the red, green, and blue (RGB) values of a color. For example:
color: #0000FF; /* 蓝色 */
RGB values
RGB values are a comma-separated group of values in parentheses that specify the intensities of red, green, and blue in the color. Each value is between 0 and 255. For example:
color: rgb(0, 0, 255); /* 蓝色 */
RGBA value
An extension of RGB value that adds a fourth value (alpha channel), representing the transparency of the color. Alpha channel values range from 0 (transparent) to 1 (opaque). For example:
color: rgba(0, 0, 255, 0.5); /* 半透明蓝色 */
HTML color names
CSS supports a range of standard HTML color names, including:
color: red; color: green; color: blue;
HSL and HSLA values
HSL (Hue, Saturation, Lightness) values represent a color using its hue (0-360°), saturation (0-100%), and lightness (0-100%). Extended HSLA values include a fourth alpha channel value. For example:
color: hsl(120, 50%, 50%); /* 绿色 */
color keyword
CSS also supports some special keywords, including:
- currentColor: Use the color of the parent element
- inherit: inherit color from parent element
- transparent: transparent
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