首页htmlborder_colorCSS Property Value - 如何border-color: rgba(255,255,255,0) #f00 #0f0 rgba(255,255,255,0);

CSS Property Value - 如何border-color: rgba(255,255,255,0) #f00 #0f0 rgba(255,255,255,0);

我们想知道如何border-color: rgba(255,255,255,0) #f00 #0f0 rgba(255,255,255,0);

<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
#shapeOne {
  height: 0px;
  width: 0px;
  margin: 20px;
  border-style: solid;
  border-width: 200px 200px 200px 200px;
  border-color: rgba(255, 255, 255, 0) #f00 #0f0 rgba(255, 255, 255, 0);
}

#shapeTwo {
  height: 0px;
  width: 0px;
  margin: 20px;
  border-style: solid;
  border-width: 30px 200px 30px 200px;
  border-color: rgba(255, 255, 255, 0) #00f #ff0 rgba(255, 255, 255, 0);
}

#shapeThree {
  height: 0px;
  width: 0px;
  margin: 20px;
  border-style: solid;
  border-width: 15px 200px 15px 200px;
  border-color: rgba(255, 255, 255, 0) #0ff #f0f rgba(255, 255, 255, 0);
}
</style>
</head>
<body>
  <div id="shapeOne"></div>
  <div id="shapeTwo"></div>
  <div id="shapeThree"></div>
</body>
</html>