CSS当中color的四种表示方法 - 故事情结
这是我的第一篇博客,所以写的东西会比较简单。
css当中,好多地方都会用到color属性,用来使html内容丰富多彩,例如:background-color;border-color;
第一种表示法使为直接写颜色的英文,例如:blue(蓝色),red(红的),总共可以表示17种颜色(这里不一一举例,没意义!)
css例:
body{ background-color:red};
第二种表示方法为用黄色,绿色,蓝色的值设定color的值。例如:rgb(204,213,9),(r代表red红色,g代表green绿色,b代表blue蓝色)
括号中的第一个值是red的值,第二个值是绿色的值,第三个是蓝色的值,(每个值范围在0~255之间)。
css例:
body{ background-color:rgb(100,100,100)};
第三种表示方法为用黄色,绿色,蓝色的值的百分比设定color的值。例如rgb(20%,20%,0)。
css例:
body{ background-color:rgb(10%,10%,50%) };
第四种表示方法是使用颜色的十六进制值设定color的值;十六进制颜色表示以#开头 0123456789abcdef 分别表示0~16的数字,#后面第一二位数字
表示红色的值,三四位数字表示绿色的值,最后两位数字表示蓝色的值,
例 :#cc0066;cc表示红色的部分,00表示绿色部分,66表示黄色部分。其中红的部分的值为12*16+12=204,204就是red的值
绿色部分的值为0*16+0=0,0就是green部分的值,蓝色部分的值为6*16+6=112;112就是blue的值
也许还会出现例如#c06这样的颜色表示方法,这是因为红色、绿色、蓝色部分的俩个值相同,其值为#cc0066,#c06为他的缩写形式;#a这种表示
方法是因为所有的六个值都相等,其值为#aaaaaa,#a是其缩写;
css例:
body{ background-color:#21439c};
现在最常使用的是第四种方式,因为表示方法比较简单。
ps 我觉得在开发过程中没必要知道颜色的值显示怎样的颜色,因为这太难了,可以借助某些工具辅助颜色值得选择。

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