## 带透明度的颜色值rbga ~~~ <div style="background-color:rgba(0,0,0,0.5)">透明度背景</div> <div style="border:solid 10px rgba(255,0,0,0.5)">透明度边框</div> ~~~ <div style="background-color:rgba(0,0,0,0.5)">透明度背景</div> <div style="border:solid 10px rgba(255,0,0,0.5)">透明度边框</div>