<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .ele{ background-color: #ded6ee; } .ele:hover { border: 1px solid cornflowerblue; } .ele:hover .ele-e{ color: #fff;} </style> </head> <body> <div class="ele"> <div class="ele-e"> 123 </div> <div class="el"> 123 </div> </div> </body> </html>