diff --git a/news/textbox-color.rst b/news/textbox-color.rst
new file mode 100644
index 00000000..d8c98f14
--- /dev/null
+++ b/news/textbox-color.rst
@@ -0,0 +1,23 @@
+**Added:**
+
+* <news item>
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* Change background color to match system settings in `Phase Configuration`.
+
+**Security:**
+
+* <news item>
diff --git a/src/diffpy/pdfgui/gui/phaseconfigurepanel.py b/src/diffpy/pdfgui/gui/phaseconfigurepanel.py
index 1050ef42..365ecd76 100644
--- a/src/diffpy/pdfgui/gui/phaseconfigurepanel.py
+++ b/src/diffpy/pdfgui/gui/phaseconfigurepanel.py
@@ -320,6 +320,7 @@ def restrictConstrainedParameters(self):
 
         self.setToolTips(tooltips.phasepanel)
         self.textCtrlA.DefaultStyle.BackgroundColour
+        txtbg = self.textCtrlScaleFactor.DefaultStyle.BackgroundColour
 
         # First the TextCtrls
         for key, var in self.lConstraintsMap.items():
@@ -331,8 +332,7 @@ def restrictConstrainedParameters(self):
                 tt.SetTip(self.constraints[var].formula)
             else:
                 textCtrl.SetEditable(True)
-                # textCtrl.SetBackgroundColour(txtbg)
-                textCtrl.SetBackgroundColour(wx.WHITE)
+                textCtrl.SetBackgroundColour(txtbg)
 
         # Now the grid
         rows = self.gridAtoms.GetNumberRows()