css: 十六进制色值和简写的十六进制色值有区别吗？

Question

CSS:

h1 {color:#000;}

html:

<h1>This is heading 1</h1>

问题:

color:#000;(简写为十六进制颜色值)和color:#000000(十六进制颜色值)有区别吗？

Answer 1

完全没有区别。根据 the CSS Color Module spec :

The three-digit RGB notation (#rgb) is converted into six-digit form (#rrggbb) by replicating digits, not by adding zeros. For example, #fb0 expands to #ffbb00. This ensures that white (#ffffff) can be specified with the short notation (#fff)...