border-bottom-right-radius
The border-bottom-right-radius CSS property sets the rounding of the bottom-right corner of the element. The rounding can be a circle or an ellipse, or if one of the value is 0 no rounding is done and the corner is square.
A background, being an image or a color, is clipped at the border, even a rounded one; the exact location of the clipping is defined by the value of the background-clip property.
Example
<!DOCTYPE HTML>
<html>
<head>
<title>CSS Tutorials</title>
<style>
div {
border-bottom-right-radius: 40%;
border-style: black 3px double;
background-color: rgb(250, 20, 70);
background-clip: content-box;
width: 200px;
height:300px;
}
</style>
</head>
<body>
<div>
border bottom right radius
</div>
</body>
</html>
