Nibble math works better than parsing things manually

Models/PaletteModel.cs

@@ -1,38 +1,20 @@
-using System.Drawing;
-using System.Text.RegularExpressions;
+using System;
+using SixLabors.ImageSharp;
 
 namespace fxl.codes.kisekae.Models
 {
     public class PaletteModel
     {
-        private const string Regex = "%([a-zA-Z0-9\\-]*\\.[kKcCfF]+)[\\s]*;(.*)";
-
         public PaletteModel(string line)
         {
-            var matcher = new Regex(Regex);
-            var match = matcher.Match(line);
+            var parts = line.Split(';');
+            FileName = parts[0].Replace("%", "").Trim();
 
-            foreach (var group in matcher.GetGroupNames())
-            {
-                if (group == "0") continue;
-
-                match.Groups.TryGetValue(group, out var value);
-                if (string.IsNullOrEmpty(value?.Value)) continue;
-
-                switch (group)
-                {
-                    case "1":
-                        FileName = value.Value;
-                        break;
-                    case "2":
-                        Comment = value.Value;
-                        break;
-                }
-            }
+            if (parts.Length > 1) Comment = parts[1].Trim();
         }
 
         public string FileName { get; }
         public string Comment { get; }
-        internal Color[] Colors { get; set; }
+        public Color[] Colors { get; set; } = Array.Empty<Color>();
     }
 }