diff --git a/osu.Game/Beatmaps/Formats/IHasCustomColours.cs b/osu.Game/Beatmaps/Formats/IHasCustomColours.cs
index 1ac5ca83cb..dba3a37545 100644
--- a/osu.Game/Beatmaps/Formats/IHasCustomColours.cs
+++ b/osu.Game/Beatmaps/Formats/IHasCustomColours.cs
@@ -8,6 +8,6 @@ namespace osu.Game.Beatmaps.Formats
 {
     public interface IHasCustomColours
     {
-        IDictionary<string, Color4> CustomColours { get; }
+        Dictionary<string, Color4> CustomColours { get; }
     }
 }
diff --git a/osu.Game/Skinning/LegacyManiaSkinConfiguration.cs b/osu.Game/Skinning/LegacyManiaSkinConfiguration.cs
index 7972cc7d06..65d5851455 100644
--- a/osu.Game/Skinning/LegacyManiaSkinConfiguration.cs
+++ b/osu.Game/Skinning/LegacyManiaSkinConfiguration.cs
@@ -23,7 +23,7 @@ public class LegacyManiaSkinConfiguration : IHasCustomColours
 
         public readonly int Keys;
 
-        public IDictionary<string, Color4> CustomColours { get; } = new SortedDictionary<string, Color4>();
+        public Dictionary<string, Color4> CustomColours { get; set; } = new Dictionary<string, Color4>();
 
         public Dictionary<string, string> ImageLookups = new Dictionary<string, string>();
 
diff --git a/osu.Game/Skinning/SkinConfiguration.cs b/osu.Game/Skinning/SkinConfiguration.cs
index 18d970dd64..2857ad3824 100644
--- a/osu.Game/Skinning/SkinConfiguration.cs
+++ b/osu.Game/Skinning/SkinConfiguration.cs
@@ -1,9 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using System;
 using System.Collections.Generic;
-using System.Linq;
 using osu.Game.Beatmaps.Formats;
 using osuTK.Graphics;
 
@@ -12,7 +10,7 @@ namespace osu.Game.Skinning
     /// <summary>
     /// An empty skin configuration.
     /// </summary>
-    public class SkinConfiguration : IEquatable<SkinConfiguration>, IHasComboColours, IHasCustomColours
+    public class SkinConfiguration : IHasComboColours, IHasCustomColours
     {
         public readonly SkinInfo SkinInfo = new SkinInfo();
 
@@ -47,10 +45,8 @@ public IReadOnlyList<Color4> ComboColours
 
         public void AddComboColours(params Color4[] colours) => comboColours.AddRange(colours);
 
-        public IDictionary<string, Color4> CustomColours { get; } = new SortedDictionary<string, Color4>();
+        public Dictionary<string, Color4> CustomColours { get; set; } = new Dictionary<string, Color4>();
 
         public readonly SortedDictionary<string, string> ConfigDictionary = new SortedDictionary<string, string>();
-
-        public bool Equals(SkinConfiguration other) => other != null && ConfigDictionary.SequenceEqual(other.ConfigDictionary) && ((ComboColours == null && other.ComboColours == null) || ComboColours.SequenceEqual(other.ComboColours)) && CustomColours.SequenceEqual(other.CustomColours);
     }
 }