使用jquery/javascript点击增加CSS亮度颜色？

因此,如果我有一个文本“Click Me to Brighten”,它具有一些深绿色十六进制颜色的CSS颜色属性,如“#00801a”,我想这样做,以便当我点击它时,它会使它变成浅绿色.同样,如果它是一些蓝色,点击它会使它变成浅蓝色.基本上我想知道是否有办法在不知道实际颜色的情况下改变css颜色.

解决方法

转换为HSV以改变brigthness

See the full code example on jsFiddle

此版本使用HSV.我将原始rgb值转换为hsv并更改v的值以获得更浅的颜色.我从Pointy回答了RgbToHsv,我刚刚为灰色添加了一点修复.我得到了HsvToRgb on this website

当页面加载时,我将rgb转换为hsv更改v值,转换回rgb并使用新值更改元素的css.

function AppendColor(light) {
    $(".dark").each(function(i){
      // get the RGB from existing elements
        var color = $(this).css("background-color");
        color = color.replace(/[^0-9,]+/g,"");
        var red = color.split(",")[0];
        var gre = color.split(",")[1];
        var blu = color.split(",")[2];

      // convert rgb to hsv
        var hsv = RgbToHsv(red,gre,blu);
      // convert hsv to rgb modifing the `v` param
        var rgb = HsvToRgb(hsv.h,hsv.s,light);

      // creates a new div and set the new background
      // then appends to the content
        color = "rgb(" + rgb.r + "," + rgb.g + "," + rgb.b + ")";
        $("<div />")
            .css("background",color)
            .attr("title",color)
            .appendTo($(".light").parent());
        $("<span />").html(" ").appendTo($(".light").parent())
    });
    $("<br />").appendTo($(".light").parent())
}

// tested values
AppendColor(25);
AppendColor(50);
AppendColor(75);
AppendColor(90);
AppendColor(95);
AppendColor(97);
AppendColor(99);
AppendColor(100);

结果：

通过最高颜色增加颜色值

See this example on jsFiddle

顶部的div表示深色(rgb)#801A00,#00801A,#1A0080和#D2D2D2

<div id="red" class="dark red"></div>
<div id="green" class="dark green"></div>
<div id="blue" class="dark blue"></div>
<div id="gray" class="dark gray"></div>
<br />

<div id="lred" class="lred"></div>
<div id="lgreen" class="lgreen"></div>
<div id="lblue" class="lblue"></div>
<div id="lgray" class="lgray"></div>

底部的div将从黑暗中获得浅色.

当我点击一个黑暗的div时,它将检索背景颜色,拆分值并发送到Lighthen功能.此功能将使颜色更亮.

function Lighthen(red,green,blue)
{
    var max = ([red,blue].sort(function(l,r){return r-l}))[0];
    var multiplier = max;
    multiplier = (multiplier / 255) + 1;

    // if it would still be too dark,make it lighten more
    if (multiplier < 1.5) multiplier = 1.9;

    // if it gets to white,move away a bit
    if ((max * multiplier) > 255)
    {
        multiplier = (multiplier / 230) + 1;
    }

    var r = Math.round(red * multiplier);
    var g = Math.round(green * multiplier);
    var b = Math.round(blue * multiplier);

    if (r > 255) r = 255;
    if (g > 255) g = 255;
    if (b > 255) b = 255;

    return "rgb(" + r + "," + g + "," + b + ")";
}

单击暗div时,将计算新颜色并在对应的div上更改.

$(".dark").click(function(){
    var color = $(this).css("background-color");
    color = color.replace(/[^0-9,"");
    var red = color.split(",")[0];
    var gre = color.split(",")[1];
    var blu = color.split(",")[2];

    $("#l" + $(this).attr("id"))
        .css("background",Lighthen(red,blu));
});

导致