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<!DOCTYPE html> <html> <head> <style> #p1 {background-color:rgba(255,0,0,0.3);} #p2 {background-color:rgba(0,255,0,0.3);} #p3 {background-color:rgba(0,0,255,0.3);} #p4 {background-color:rgba(192,192,192,0.3);} #p5 {background-color:rgba(255,255,0,0.3);} #p6 {background-color:rgba(255,0,255,0.3);} </style> </head> <body> <h2>具有不透明度的 RGB 颜色</h2> <p>RGBA 颜色值是 RGB 颜色值的扩展，带有 alpha 通道 - 指定对象的不透明度。</p> <p id="p1">红色</p> <p id="p2">绿色</p> <p id="p3">蓝色</p> <p id="p4">灰色</p> <p id="p5">黄色</p> <p id="p6">樱桃红</p> </body> </html>