简化javascript色彩转换函数

// RGB转十六进制
function rgbToHex(r, g, b) {
    const componentToHex = (c) => {
        const hex = c.toString(16);
        return hex.length === 1 ? "0" + hex : hex;
    };
    return "#" + componentToHex(r) + componentToHex(g) + componentToHex(b);
}

// 十六进制转RGB
function hexToRgb(hex) {
    const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
    return result ? {
        r: parseInt(result[1], 16),
        g: parseInt(result[2], 16),
        b: parseInt(result[3], 16)
    } : null;
}

// RGB转HSL
function rgbToHsl(r, g, b) {
    r /= 255, g /= 255, b /= 255;
  
    const max = Math.max(r, g, b), min = Math.min(r, g, b);
    let h, s, l = (max + min) / 2;
  
    if (max === min) {
        h = s = 0; // achromatic
    } else {
        const d = max - min;
        s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
  
        switch (max) {
            case r: h = (g - b) / d + (g < b ? 6 : 0); break;
            case g: h = (b - r) / d + 2; break;
            case b: h = (r - g) / d + 4; break;
        }
  
        h /= 6;
    }
  
    return { h: Math.round(h * 360), s: Math.round(s * 100), l: Math.round(l * 100) };
}

// HSL转RGB
function hslToRgb(h, s, l) {
    h /= 360, s /= 100, l /= 100;
    let r, g, b;
  
    if (s === 0) {
        r = g = b = l; // achromatic
    } else {
        const hue2rgb = (p, q, t) => {
            if (t < 0) t += 1;
            if (t > 1) t -= 1;
            if (t < 1 / 6) return p + (q - p) * 6 * t;
            if (t < 1 / 2) return q;
            if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
            return p;
        };
  
        const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
        const p = 2 * l - q;
  
        r = hue2rgb(p, q, h + 1 / 3);
        g = hue2rgb(p, q, h);
        b = hue2rgb(p, q, h - 1 / 3);
    }
  
    return { r: Math.round(r * 255), g: Math.round(g * 255), b: Math.round(b * 255) };
}