<!DOCTYPE html> <html lang="en-US"> <head> <title>test of border-image-source: linear-gradient with border-image-slice and fill</title> <style> div { border: 30px solid black; border-image: linear-gradient(to bottom right, red, blue); width: 180px; height: 180px; } div.border1260 { border-image-slice: 12 60 fill; } div.border6012 { border-image-slice: 60 12 fill; } </style> </head> <body> <div class="border1260"></div> <div class="border6012"></div> </body> </html>