我已经打开了一个pull request to Please.js，它允许从散列中生成颜色。

你可以像这样将字符串映射到一个颜色:

const color = Please.make_color({
    from_hash: "any string goes here"
});

例如，"any string goes here"将返回"#47291b" “another!”返回为“#1f0c3d”

我的代码是Java的。

谢谢你做的一切。

public static int getColorFromText(String text)
    {
        if(text == null || text.length() < 1)
            return Color.BLACK;

        int hash = 0;

        for (int i = 0; i < text.length(); i++)
        {
            hash = text.charAt(i) + ((hash << 5) - hash);
        }

        int c = (hash & 0x00FFFFFF);
        c = c - 16777216;

        return c;
    }

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。

只是将Java从Compute的十六进制颜色代码任意字符串移植到Javascript:

function hashCode(str) { // java String#hashCode
    var hash = 0;
    for (var i = 0; i < str.length; i++) {
       hash = str.charCodeAt(i) + ((hash << 5) - hash);
    }
    return hash;
} 

function intToRGB(i){
    var c = (i & 0x00FFFFFF)
        .toString(16)
        .toUpperCase();

    return "00000".substring(0, 6 - c.length) + c;
}

转换你会做:

intToRGB(hashCode(your_string))

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>

你真正需要的是一个好的哈希函数。在节点上，我只用

const crypto = require('crypto');
function strToColor(str) {
    return '#' + crypto.createHash('md5').update(str).digest('hex').substr(0, 6);
}