JSFiddle - React, Tailwind, and code Playground

JavaScript

document.body.innerHTML += "rgb(255,71,99)" + "<br>";
document.body.innerHTML += "Dutch wiki hue : " + nl_rgb2hue(255,71,99) + "<br>";
document.body.innerHTML += "English wiki hue : " + en_rgb2hue(255,71,99) + "<br>";
document.body.innerHTML += "SO answer hue : " + so_rgb2hue(255,71,99) + "<br>";

function nl_rgb2hue(r, g, b) {
    r = r / 255,
    g = g / 255,
    b = b / 255;
    var max = Math.max(r, g, b);
    var min = Math.min(r, g, b);
    var hue;
    if (max == min) {
        hue = 0;
        sat = 0;
    } else {
        var c = max - min;
        switch(max) {
            case r:
                hue = (g - b) / c;
                break;
            case g:
                hue = (b - r) / c + 2;
                break;
            case b:
                hue = (r - g) / c + 4;
                break;
        }
    }
    return hue * 60;
}

function en_rgb2hue(r, g, b) {
    r = r / 255,
    g = g / 255,
    b = b / 255;
    var max = Math.max(r, g, b);
    var min = Math.min(r, g, b);
    var hue;
    if (max == min) {
        hue = 0;
        sat = 0;
    } else {
        var c = max - min;
        switch(max) {
            case r:
                hue = ((g - b) / c) % 6;
                break;
            case g:
                hue = (b - r) / c + 2;
                break;
            case b:
                hue = (r - g) / c + 4;
                break;
        }
    }
    return hue * 60;
}

function so_rgb2hue(r, g, b) {
    r = r / 255,
    g = g / 255,
    b = b / 255;
    var max = Math.max(r, g, b);
    var min = Math.min(r, g, b);
    var hue;
    if (max == min) {
        hue = 0;
        sat = 0;
    } else {
        var c = max - min;
        switch(max) {
            case r:
                hue = (g - b) / c + (g < b ? 6 : 0);
                break;
            case g:
                hue = (b - r) / c + 2;
                break;
            case b:
                hue = (r - g) / c + 4;
                break;
        }
    }
    return hue...