I have some code like this. When I did not put any input in last name or first name and click submit button, it shows me the red color in border. I know that's because I use required in both of them. But I am wondering is there a way to change that red color to other colors (like green for example)?
<body>
<form id="form">
<input id="LastName" type="text" placeholder="Last Name" required/>
<input id="FirstName" type="text" placeholder="first Name" required/>
<input type="submit" id="sub" value="save">
</form>
</body>