diff --git a/ShareX.HelpersLib/Controls/MyPictureBox.cs b/ShareX.HelpersLib/Controls/MyPictureBox.cs
index 1067a0d42..1e9d4c573 100644
--- a/ShareX.HelpersLib/Controls/MyPictureBox.cs
+++ b/ShareX.HelpersLib/Controls/MyPictureBox.cs
@@ -177,8 +177,16 @@ private void UpdateImageSizeLabel()
 
         public void UpdateTheme()
         {
-            lblImageSize.BackColor = ShareXResources.Theme.BackgroundColor;
-            lblImageSize.ForeColor = ShareXResources.Theme.TextColor;
+            if (ShareXResources.UseDarkTheme)
+            {
+                lblImageSize.BackColor = ShareXResources.Theme.BackgroundColor;
+                lblImageSize.ForeColor = ShareXResources.Theme.TextColor;
+            }
+            else
+            {
+                lblImageSize.BackColor = SystemColors.Window;
+                lblImageSize.ForeColor = SystemColors.ControlText;
+            }
         }
 
         public void UpdateCheckers(bool forceUpdate = false)
diff --git a/ShareX/Forms/ApplicationSettingsForm.cs b/ShareX/Forms/ApplicationSettingsForm.cs
index d5264ae4b..3b6500a95 100644
--- a/ShareX/Forms/ApplicationSettingsForm.cs
+++ b/ShareX/Forms/ApplicationSettingsForm.cs
@@ -383,11 +383,13 @@ private void CbUseDarkTheme_CheckedChanged(object sender, EventArgs e)
         {
             Program.Settings.UseDarkTheme = cbUseDarkTheme.Checked;
             cbExperimentalDarkTheme.Enabled = Program.Settings.UseDarkTheme;
+            ApplySelectedTheme();
         }
 
         private void CbExperimentalDarkTheme_CheckedChanged(object sender, EventArgs e)
         {
             Program.Settings.ExperimentalDarkTheme = cbExperimentalDarkTheme.Checked;
+            ApplySelectedTheme();
         }
 
         private void CbUseWhiteShareXIcon_CheckedChanged(object sender, EventArgs e)