How select specific tag in jQuery using if else statement?

I would like to click the button and make the value appear in <h3> inside the <div> and according to that value the background-color would change.

For example, when I typed a value (Your number) and clicked on Click Me!, h3 inside the div should show this typed value and the background-color would also change accordingly.

For example, if I typed 33 in Your number and then clicked, the value to appear would be 33 and the color would be orange. Thus:

My code:

<script src="//ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<form name="myform">
 Your number: 
 <input type="text" name="inputbox" id='textBox' value="" />
 <input type="button" name="button" class="member" value="Click me!" />
 <div class='box1' style='background-color:lime;width:33.33%;padding-left:15px;padding-right:15px;'>
 <h3>
 0
 </h3>
 <p>
 Valor
 </p>
 </div>
</form>
<script>
 $(function() {

 $('.member').click(function() {
 var answer = $("#textBox").val();
 if (answer <= 20) {
 $('.box1').css('background-color','red');
 } else if (answer <= 50) {
 $('.box1').css('background-color','orange');
 } else {
 $('.box1').css('background-color','steelblue');
 }
 });

 });

</script> 

So I wanted to select the h3 tag and change it with if else statement.