使用hashCode，就像Cristian Sanchez用hsl和现代javascript回答的那样，你可以创建一个具有良好对比度的颜色选择器，如下所示:

函数hashCode(str) { 设hash = 0; For (var I = 0;I < str.length;我+ +){ hash = str.charCodeAt(i) + ((hash << 5) - hash); ｝ 返回哈希; ｝ 函数pickColor(str) { 返回' hsl(${hashCode(str) % 360}， 100%， 80%) '; ｝ one.style.backgroundColor = pickColor(one.innerText) two.style.backgroundColor = pickColor(two.innerText) div { 填充:10 px; ｝ < div id = " 1 " > < / div >一 < div id = "两个“>两个div > < /

因为它是hsl，你可以缩放亮度来得到你想要的对比度。

function hashCode(str) { let hash = 0; for (var i = 0; i < str.length; i++) { hash = str.charCodeAt(i) + ((hash << 5) - hash); } return hash; } function pickColor(str) { // Note the last value here is now 50% instead of 80% return `hsl(${hashCode(str) % 360}, 100%, 50%)`; } one.style.backgroundColor = pickColor(one.innerText) two.style.backgroundColor = pickColor(two.innerText) div { color: white; padding: 10px; } <div id="one">One</div> <div id="two">Two</div>

我想要类似丰富的HTML元素的颜色，我惊讶地发现CSS现在支持hsl()颜色，所以一个完整的解决方案如下:

另参见如何自动生成N“不同”的颜色?更多类似的选择。

编辑:根据@zei的版本更新(美式拼写)

var stringToColor = (string, saturation = 100, lightness = 75) => { let hash = 0; for (let i = 0; i < string.length; i++) { hash = string.charCodeAt(i) + ((hash << 5) - hash); hash = hash & hash; } return `hsl(${(hash % 360)}, ${saturation}%, ${lightness}%)`; } // For the sample on stackoverflow function colorByHashCode(value) { return "<span style='color:" + stringToColor(value) + "'>" + value + "</span>"; } document.body.innerHTML = [ "javascript", "is", "nice", ].map(colorByHashCode).join("<br/>"); span { font-size: 50px; font-weight: 800; }

在HSL中，它的色调，饱和度，亮度。所以色调在0-359之间会得到所有的颜色，饱和度是你想要的颜色的丰富程度，100%对我来说是合适的。而亮度决定了深度，50%是正常的，25%是深色，75%是粉彩。我有30%，因为它最适合我的配色方案。

我有一个情况，我想显示基于用户的用户名的背景，并显示用户名的第一个字母在顶部。 我使用爱的代码，它为我工作得很好

var stringToColour = function (str) {
var hash = 0;
for (var i = 0; i < str.length; i++) {
  hash = str.charCodeAt(i) + ((hash << 5) - hash);
}
var colour = '#';
for (var i = 0; i < 3; i++) {
  var value = (hash >> (i * 8)) & 0xff;
  colour += ('00' + value.toString(16)).substr(-2);
}
return colour;}

为了找到合适的颜色，你可以使用

function lightOrDark(color) {
// Check the format of the color, HEX or RGB?
if (color.match(/^rgb/)) {
  // If HEX --> store the red, green, blue values in separate variables
  color = color.match(
    /^rgba?\((\d+),\s*(\d+),\s*(\d+)(?:,\s*(\d+(?:\.\d+)?))?\)$/,
  );

  var r = color[1];
  var g = color[2];
  var b = color[3];
} else {
  // If RGB --> Convert it to HEX: http://gist.github.com/983661
  color = +(
    '0x' + color.slice(1).replace(color.length < 5 && /./g, '$&$&')
  );

  r = color >> 16;
  g = (color >> 8) & 255;
  b = color & 255;
}

// HSP equation from http://alienryderflex.com/hsp.html
var hsp = Math.sqrt(0.299 * (r * r) + 0.587 * (g * g) + 0.114 * (b * b));

// Using the HSP value, determine whether the color is light or dark
if (hsp > 127.5) {
  return 'light';
} else {
  return 'dark';
}

}

以下是对CD Sanchez的答案的改编，它始终返回一个6位数的颜色代码:

var stringToColour = function(str) {
  var hash = 0;
  for (var i = 0; i < str.length; i++) {
    hash = str.charCodeAt(i) + ((hash << 5) - hash);
  }
  var colour = '#';
  for (var i = 0; i < 3; i++) {
    var value = (hash >> (i * 8)) & 0xFF;
    colour += ('00' + value.toString(16)).substr(-2);
  }
  return colour;
}

用法:

stringToColour("greenish");
// -> #9bc63b

例子:

http://jsfiddle.net/sUK45/

(另一种/更简单的解决方案可能涉及返回'rgb(…)'风格的颜色代码。)

使用hashCode，就像Cristian Sanchez用hsl和现代javascript回答的那样，你可以创建一个具有良好对比度的颜色选择器，如下所示:

函数hashCode(str) { 设hash = 0; For (var I = 0;I < str.length;我+ +){ hash = str.charCodeAt(i) + ((hash << 5) - hash); ｝ 返回哈希; ｝ 函数pickColor(str) { 返回' hsl(${hashCode(str) % 360}， 100%， 80%) '; ｝ one.style.backgroundColor = pickColor(one.innerText) two.style.backgroundColor = pickColor(two.innerText) div { 填充:10 px; ｝ < div id = " 1 " > < / div >一 < div id = "两个“>两个div > < /

因为它是hsl，你可以缩放亮度来得到你想要的对比度。

function hashCode(str) { let hash = 0; for (var i = 0; i < str.length; i++) { hash = str.charCodeAt(i) + ((hash << 5) - hash); } return hash; } function pickColor(str) { // Note the last value here is now 50% instead of 80% return `hsl(${hashCode(str) % 360}, 100%, 50%)`; } one.style.backgroundColor = pickColor(one.innerText) two.style.backgroundColor = pickColor(two.innerText) div { color: white; padding: 10px; } <div id="one">One</div> <div id="two">Two</div>

我发现随机生成的颜色往往没有足够的对比度来满足我的口味。我发现解决这个问题最简单的方法是预先填充一个非常不同的颜色列表。对于每个新字符串，分配列表中的下一个颜色:

// Takes any string and converts it into a #RRGGBB color.
var StringToColor = (function(){
    var instance = null;

    return {
    next: function stringToColor(str) {
        if(instance === null) {
            instance = {};
            instance.stringToColorHash = {};
            instance.nextVeryDifferntColorIdx = 0;
            instance.veryDifferentColors = ["#000000","#00FF00","#0000FF","#FF0000","#01FFFE","#FFA6FE","#FFDB66","#006401","#010067","#95003A","#007DB5","#FF00F6","#FFEEE8","#774D00","#90FB92","#0076FF","#D5FF00","#FF937E","#6A826C","#FF029D","#FE8900","#7A4782","#7E2DD2","#85A900","#FF0056","#A42400","#00AE7E","#683D3B","#BDC6FF","#263400","#BDD393","#00B917","#9E008E","#001544","#C28C9F","#FF74A3","#01D0FF","#004754","#E56FFE","#788231","#0E4CA1","#91D0CB","#BE9970","#968AE8","#BB8800","#43002C","#DEFF74","#00FFC6","#FFE502","#620E00","#008F9C","#98FF52","#7544B1","#B500FF","#00FF78","#FF6E41","#005F39","#6B6882","#5FAD4E","#A75740","#A5FFD2","#FFB167","#009BFF","#E85EBE"];
        }

        if(!instance.stringToColorHash[str])
            instance.stringToColorHash[str] = instance.veryDifferentColors[instance.nextVeryDifferntColorIdx++];

            return instance.stringToColorHash[str];
        }
    }
})();

// Get a new color for each string
StringToColor.next("get first color");
StringToColor.next("get second color");

// Will return the same color as the first time
StringToColor.next("get first color");

虽然它的颜色限制只有64种，但我发现大多数人在那之后都无法真正分辨出区别。我认为你可以添加更多的颜色。

虽然这段代码使用了硬编码的颜色，但至少可以保证您在开发过程中确切地知道在生产中您将看到的颜色之间的对比有多大。

颜色列表是从这个SO答案中提取的，还有其他更多颜色的列表。