Added HexColorConverter

Implementation provided by https://github.com/Caeden117/CountersPlus/blob/rewrite/Counters%2B/ConfigModels/Converters/ColorConverter.cs

IPA.Loader/Config/Stores/Converters.cs

@@ -6,6 +6,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using UnityEngine;
 using Boolean = IPA.Config.Data.Boolean;
 
 namespace IPA.Config.Stores.Converters
@@ -483,6 +484,42 @@ namespace IPA.Config.Stores.Converters
         public IReadOnlyDictionaryConverter() : base(new TConverter()) { }
     }
 #endif
+    
+    /// <summary>
+    /// A converter for <see cref="Color"/> objects.
+    /// </summary>
+    public sealed class HexColorConverter : ValueConverter<Color>
+    {
+        /// <summary>
+        /// Converts a <see cref="Value"/> that is a <see cref="Text"/> node to the corresponding <see cref="Color" /> object.
+        /// </summary>
+        /// <param name="value">the <see cref="Value"/> to convert</param>
+        /// <param name="parent">the object which will own the created object</param>
+        /// <returns>the deserialized Color object</returns>
+        /// <exception cref="ArgumentException">if <paramref name="value"/> is not a <see cref="Text"/> node or couldn't be parsed into a Color object</exception>
+        public override Color FromValue(Value value, object parent)
+        {
+            if (value is Text t)
+            {
+                if (ColorUtility.TryParseHtmlString(t.Value, out Color color))
+                {
+                    return color;
+                }
+
+                throw new ArgumentException("Value cannot be parsed into a Color.", nameof(value));
+            }
+
+            throw new ArgumentException("Value not a string", nameof(value));
+        }
+
+        /// <summary>
+        /// Converts color of type <see cref="Color"/> to a <see cref="Value"/> node.
+        /// </summary>
+        /// <param name="obj">the object to serialize</param>
+        /// <param name="parent">the object which owns <paramref name="obj"/></param>
+        /// <returns>a <see cref="Text"/> node representing <paramref name="obj"/></returns>
+        public override Value ToValue(Color obj, object parent) => Value.Text($"#{ColorUtility.ToHtmlStringRGB(obj)}");
+    }
 
     internal class StringConverter : ValueConverter<string>
     {