请老师检查。另外可以通过val方法获取输入值后进行操作吗？

<!DOCTYPE html >

<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery练习</title>

<style type="text/css">
.div1 {
	float: left;
	width: 50px;
	line-height: 30px;
	background-color: lightgray;
	margin-left: 10px;
	text-align: center;
	vertical-align: middle;
}

.div2 {
	width: 300px;
	height: 300px;
	border: solid gray 1px;
	margin-top: 60px;
	color: red;
}
</style>


</head>
<body>
	<h2>请选择背景颜色</h2>
	<div>
		<div id="blue" class="div1">蓝色</div>
		<div id="green" class="div1">绿色</div>
	</div>
	<div class="div2" id="bg"></div>
	<div>
		输入颜色首字母： <input type="text" name="color">
	</div>
	<script type="text/javascript"	src="//lib.baomitu.com/jquery/3.5.1/jquery.min.js"></script>
	<script type="text/javascript">
			$(function(){
				alert("欢迎来到设置颜色的页面");
			});
			$("#blue").click(function(){
				$("#bg").css({
					"background-color":"blue",
					"font-style":"normal",
					"font-weight":"normal"
				});
				$("#bg").text("蓝色背景");
			});
			$("#green").click(function(){
				$("#bg").css({
					"background-color":"green",
					"font-style":"italic",
					"font-weight":"bold"
					});
				$("#bg").text("绿色背景");
			});
			$("input[name='color']").keypress(function(event){
				if(event.key=="B"){
					$("#bg").empty();
					$("#bg").css("background-color","blue");
				}
				if(event.key=="G"){
					$("#bg").empty();
					$("#bg").css("background-color","green");
				}
			});
/* 			$("input[name='color']").keyup(function(){
				var letter=$(this).val();
				if(letter=="B"){
					$("#bg").empty();
					$("#bg").css("background-color","blue")
				}
				if(letter=="G"){
					$("#bg").empty();
					$("#bg").css("background-color","green")
				}
			});
*/	
	</script>
</body>
</html>