<body>
<div style=" width:250px;
height:250px;
box-sizing:border-box;
border:20px solid transparent;
background-clip:padding-box,border-box;
background-origin:padding-box,border-box;
background-image:linear-gradient(90deg,#fff,#fff),linear-gradient(90deg,#5c5fa5,#893f60);">
</div>
</body>
<div style=" width:250px;
height:250px;
box-sizing:border-box;
border:20px solid transparent;
background-clip:padding-box,border-box;
background-origin:padding-box,border-box;
background-image:linear-gradient(90deg,#fff,#fff),linear-gradient(90deg,#5c5fa5,#893f60);">
</div>
</body>