For defining a single rule for multiple CSS classes or id’s, CSS can be used as :
#idName1, #idName2, #idName3, #idName4, #idName5 { background-color:#BFEAF1; /* your css rule*/ }
A complete example will be demonstrated as :
<!DOCTYPE html> <html> <head> <style> .first, .second { background-color:#BFEAF1; } </style> </head> <body> Name: <input type="text" class ="first" name="fullname"> <br> Email: <input type="text" class ="second" name="email"> </body> </html>