chrome95版本以后新增EyeDropper api支持通过js来获取电脑屏幕任意位置的颜色值了，示例代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum=1.0,minimum=1.0,user-scalable=0" />
<title>BFW NEW PAGE</title>
<style>
.preview {
height: 30px;
border-radius: 15px;
width: 30px;
display: block;
float: left;
}
</style>
</head>
<body>
<div class="output">
<span class="preview"></span>
<input type="text" class="color">
<button class="getColor">点击取色</button>
</div>
<script>
if (!window.EyeDropper) {
window.pre.innerHTML = "需要Chrome 95以上才支持屏幕取色";
}
const getColor = async e => {
const eyeDropper = new EyeDropper();
try {
const { sRGBHex } = await eyeDropper.open();
document.querySelector('.preview').
style.background = sRGBHex;
document.querySelector('.color').value = sRGBHex;
} catch (e) {
document.querySelector('.color').value = '出错了';
}
};
// Click binding
document.querySelector(".getColor").
addEventListener("click", getColor);
</script>
</body>
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