颜色值 Color Type Values
- Color Name
- HEX
- RGB
- RGBA
- HSL
- HSLA
- transparent
文本值 Textual Data Type Values
- <string>
- <url>
- <identifier>
函数值 Functional Notations Type Values
- counter()
- attr()
- calc()
- min()
- max()
- cycle()
图像值 Image Type Values
- linear-gradient()
- radial-gradient()
- repeating-linear-gradient()
- repeating-radial-gradient()
数字值 Numeric Data Type Values
- <number>
- <integer>
其它数据类型值 Other Data Types Values
- <length>
- <percentage>
- <angle>
- <time>
- <frequency>
- <fraction>
- <grid>