diff --git a/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBox.razor b/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBox.razor
index 4591f2bc..7d3a148e 100644
--- a/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBox.razor
+++ b/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBox.razor
@@ -145,8 +145,8 @@
                                                 <MudCheckBox Class="mx-4" Dense
                                                              @bind-Checked="@_allSelected" @onclick="@SelectAllItems"
                                                              Size="@CheckBoxSize"
-                                                             Color="@CheckBoxCheckedColor"
-                                                             UnCheckedColor="@CheckBoxUnCheckedColor" />
+                                                             Color="@EffectiveCheckBoxCheckedColor"
+                                                             UnCheckedColor="@EffectiveCheckBoxUnCheckedColor" />
 
                                                 <MudText Typo="GetTypo()" Color="@TextColor">@SelectAllText</MudText>
                                             </div>
diff --git a/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBox.razor.cs b/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBox.razor.cs
index fe6a74e5..c874f371 100644
--- a/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBox.razor.cs
+++ b/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBox.razor.cs
@@ -265,18 +265,18 @@ protected internal void SetSearchString(T value)
         /// <summary>
         /// The color of the checked checkbox. It supports the theme colors.
         /// </summary>
-        /// <remarks>The default is <see cref="Color.Primary"/></remarks>
+        /// <remarks>The default is <see cref="MudCheckBox.Color"/></remarks>
         [Parameter]
         [Category(CategoryTypes.List.Behavior)]
-        public Color CheckBoxCheckedColor { get; set; } = Color.Primary;
+        public Color? CheckBoxCheckedColor { get; set; } = null;
 
         /// <summary>
         /// The color of the unchecked checkbox. It supports the theme colors.
         /// </summary>
-        /// <remarks>The default is <see cref="Color.Default"/></remarks>
+        /// <remarks>The default is <see cref="MudCheckBox.Color"/></remarks>
         [Parameter]
         [Category(CategoryTypes.Radio.Appearance)]
-        public Color CheckBoxUnCheckedColor { get; set; } = Color.Default;
+        public Color? CheckBoxUnCheckedColor { get; set; } = null;
 
         /// <summary>
         /// The size of the checkbox.
@@ -1484,5 +1484,8 @@ protected bool HasEligibleItems()
         protected internal Typo GetTypo() => Dense == Dense.Slim || Dense == Dense.Superslim ? Typo.body2 : Typo.body1;
 
         protected internal ValueTask ScrollToMiddleAsync(MudComboBoxItem<T> item) => item is not null ? ScrollManagerExtended.ScrollToMiddleAsync(_popoverId, item.ItemId) : ValueTask.CompletedTask;
+
+        protected internal Color EffectiveCheckBoxCheckedColor => CheckBoxCheckedColor ?? Color;
+        protected internal Color EffectiveCheckBoxUnCheckedColor => CheckBoxUnCheckedColor ?? Color;
     }
 }
diff --git a/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBoxItem.razor b/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBoxItem.razor
index 8da94149..39dca30d 100644
--- a/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBoxItem.razor
+++ b/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBoxItem.razor
@@ -12,8 +12,8 @@
             <MudCheckBox Class="me-4" Dense
                          @bind-Checked="@Selected" @onclick="@HandleOnClick"
                          Size="@(CheckBoxSize ?? MudComboBox.CheckBoxSize)"
-                         Color="@(CheckBoxCheckedColor ?? MudComboBox.CheckBoxCheckedColor)"
-                         UnCheckedColor="@(CheckBoxUnCheckedColor ?? MudComboBox.CheckBoxUnCheckedColor)"
+                         Color="@(CheckBoxCheckedColor ?? MudComboBox.EffectiveCheckBoxCheckedColor)"
+                          UnCheckedColor="@(CheckBoxUnCheckedColor ?? MudComboBox.EffectiveCheckBoxUnCheckedColor)"
                          Disabled="@Disabled" />
         }
 
diff --git a/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBoxItem.razor.cs b/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBoxItem.razor.cs
index ff2f8070..a72cca44 100644
--- a/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBoxItem.razor.cs
+++ b/CodeBeam.MudBlazor.Extensions/Components/ComboBox/MudComboBoxItem.razor.cs
@@ -206,18 +206,8 @@ protected void SyncSelected()
 
         protected async Task HandleOnClick()
         {
-            //Selected = !Selected;
             await MudComboBox.ToggleOption(this, !Selected);
-            //await MudComboBox?.SelectOption(Value);
             await InvokeAsync(StateHasChanged);
-            //if (MudComboBox.MultiSelection == false)
-            //{
-            //    await MudComboBox?.CloseMenu();
-            //}
-            //else
-            //{
-            //    await MudComboBox.FocusAsync();
-            //}
             await MudComboBox.FocusAsync();
             await OnClick.InvokeAsync();
         }