JavaScript输出各色系随机颜色【红绿蓝青黄紫、黑白、全彩】

╰半橙微兮° 2022-08-19 00:26 21阅读 0赞

<!DOCTYPE html>
    <html >
     <head>
      <title> 随机色系-黑白红绿蓝青黄紫</title>
      <meta charset="utf-8" />
      <script src="/js/jquery-2.1.4.min.js" type="text/javascript"></script>
      
     <style type="text/css">
    	li {
    		width: 50px;
    		height: 50px;
    		margin: 10px;
    		display: inline-block;
    		border-radius: 100%;
    		background: rgba(1,1,1,1);
    	}
    
    	a {
    		display: inline-block;
    		width: 50px;
    		height: 20px;
    		margin: 10px;
    		background: #ddd;
    		text-align: center;
    		border-radius: 6px;
    	}
     </style>
    <script type="text/javascript">
     $(function(){
    	for (i=0;i<100 ;i++ ){
    		$("li:first").clone().insertAfter("ul");
    	}
    	listColor(1,1,1,1);
    
    });
    //--------------------------
    function listColor(r,g,b,a){
    	$("li:first").css("background","rgba("+r*255+","+g*255+","+b*255+",1)");
    	$("li:not(:first)").each(function(){
    		$(this).css("background",getColor_rgba(r,g,b,a));
    	});
    }
    //------------------------
    function getColor_rgba(r, g, b, a) {//主函数：输出rgba颜色格式："rgba(255,255,255,0.8)"
        var rgb = 155;
        var c = Math.floor(Math.random() * (255 - rgb) + rgb);
        if (r * g * b == 1) {
            r = Math.floor(Math.random() * 255);
            g = Math.floor(Math.random() * 255);
            b = Math.floor(Math.random() * 255);
        } else if (r + g + b == 0) {
            var t = Math.floor(Math.random() * 255);
            r = t;
            g = t;
            b = t;
        } else {
            r = r == 1 ? (Math.floor(Math.random() * (255 - rgb) + rgb)) : (Math.floor(Math.random() * (c / 2)));
            g = g == 1 ? Math.floor(Math.random() * (255 - rgb) + rgb) : Math.floor(Math.random() * (c / 2));
            b = b == 1 ? Math.floor(Math.random() * (255 - rgb) + rgb) : Math.floor(Math.random() * (c / 2));
        }
        return "rgba(" + r + "," + g + "," + b + "," + a + ")";
    }
    </script>
     </head>
    
     <body>
    	<a href="javascript:listColor(1,0,0,0.8)">红</a>
    	<a href="javascript:listColor(0,1,0,0.8)">绿</a>
    	<a href="javascript:listColor(0,0,1,0.8)">蓝</a>
    	<a href="javascript:listColor(0,1,1,0.8)">青</a>
    	<a href="javascript:listColor(1,1,0,0.8)">黄</a>
    	<a href="javascript:listColor(1,0,1,0.8)">紫</a>
    	<a href="javascript:listColor(1,1,1,0.8)">全彩</a>
    	<a href="javascript:listColor(0,0,0,0.8)">黑白</a>
    	<ul><li></li></ul>
     </body>
    </html>

![20151228211937746][]

[20151228211937746]: /images/20220731/5f2e77604dc1496b989f5005416df29a.png