Color Converter for C# / .NET Developers

using System;
using System.Drawing; // Available on Windows; use SixLabors.ImageSharp cross-platform

// Hex to RGB
static Color HexToColor(string hex) => ColorTranslator.FromHtml(hex);

// RGB to Hex
static string RgbToHex(int r, int g, int b) => $"#{r:X2}{g:X2}{b:X2}".ToLower();

// RGB to HSL
static (double H, double S, double L) RgbToHsl(int r, int g, int b) {
    var color = Color.FromArgb(r, g, b);
    double rn = r/255.0, gn = g/255.0, bn = b/255.0;
    double max = Math.Max(rn, Math.Max(gn, bn));
    double min = Math.Min(rn, Math.Min(gn, bn));
    double l = (max + min) / 2;
    return (H: 0, S: 0, L: l * 100);
}