CSS authoritative Guide (third Edition)---Fourth chapter values and units

This chapter focuses on the values of some property declarations:

The values in CSS are mainly numbers, percentages, colors,

1. Color:

RGB (100%,100%,100%) or RGB (255,255,255) or #FF0000

Web security color: refers to a value that is a multiple of 20%,51,0x33.

2. Length unit: unit with in cm mm PT pc

Where: 1in = 2.54cm 1cm = 0.394in 1in = 72pt 1pc = 12pt

Relative length unit: em,ex,px

3.URL

4. Keyword: none inherit

In addition, there are some values that are used on other devices.

Includes: Angle value, time value, frequency value, etc.

Summary: In terms of units, basically completely correct, but there are also a small number of bugs and strange problems.

CSS authoritative Guide (third Edition)---Fourth chapter values and units