css怎么定义字体颜色

selector {  color: #RRGGBB | rgb(r, g, b) | rgba(r, g, b, a) | color-name;}

p {  color: #000000;}h1 {  color: rgb(255, 0, 0);}a {  color: rgba(0, 0, 255, 0.5);}.error {  color: red;}