diff --git a/NanoVNASaver/Calibration.py b/NanoVNASaver/Calibration.py
index 9d4d7f6..c66d7ed 100644
--- a/NanoVNASaver/Calibration.py
+++ b/NanoVNASaver/Calibration.py
@@ -130,13 +130,19 @@ class CalibrationWindow(QtWidgets.QWidget):
         cal_standard_layout.addRow(self.use_ideal_values)
 
         self.cal_short_box = QtWidgets.QGroupBox("Short")
+        # self.cal_short_box.setProperty("cssClass", "cal_box")
         cal_short_form = QtWidgets.QFormLayout(self.cal_short_box)
         self.cal_short_box.setDisabled(True)
         self.short_l0_input = QtWidgets.QLineEdit("0")
+        self.short_l0_input.setProperty("cssClass", "cal_input")
         self.short_l1_input = QtWidgets.QLineEdit("0")
+        self.short_l1_input.setProperty("cssClass", "cal_input")
         self.short_l2_input = QtWidgets.QLineEdit("0")
+        self.short_l2_input.setProperty("cssClass", "cal_input")
         self.short_l3_input = QtWidgets.QLineEdit("0")
+        self.short_l3_input.setProperty("cssClass", "cal_input")
         self.short_length = QtWidgets.QLineEdit("0")
+        self.short_length.setProperty("cssClass", "cal_input")
         cal_short_form.addRow("L0 (F(e-12))", self.short_l0_input)
         cal_short_form.addRow("L1 (F(e-24))", self.short_l1_input)
         cal_short_form.addRow("L2 (F(e-33))", self.short_l2_input)
@@ -144,13 +150,19 @@ class CalibrationWindow(QtWidgets.QWidget):
         cal_short_form.addRow("Offset Delay (ps)", self.short_length)
 
         self.cal_open_box = QtWidgets.QGroupBox("Open")
+        # self.cal_open_box.setProperty("cssClass", "cal_box")
         cal_open_form = QtWidgets.QFormLayout(self.cal_open_box)
         self.cal_open_box.setDisabled(True)
         self.open_c0_input = QtWidgets.QLineEdit("50")
+        self.open_c0_input.setProperty("cssClass", "cal_input")
         self.open_c1_input = QtWidgets.QLineEdit("0")
+        self.open_c1_input.setProperty("cssClass", "cal_input")
         self.open_c2_input = QtWidgets.QLineEdit("0")
+        self.open_c2_input.setProperty("cssClass", "cal_input")
         self.open_c3_input = QtWidgets.QLineEdit("0")
+        self.open_c3_input.setProperty("cssClass", "cal_input")
         self.open_length = QtWidgets.QLineEdit("0")
+        self.open_length.setProperty("cssClass", "cal_input")
         cal_open_form.addRow("C0 (H(e-15))", self.open_c0_input)
         cal_open_form.addRow("C1 (H(e-27))", self.open_c1_input)
         cal_open_form.addRow("C2 (H(e-36))", self.open_c2_input)
@@ -158,22 +170,29 @@ class CalibrationWindow(QtWidgets.QWidget):
         cal_open_form.addRow("Offset Delay (ps)", self.open_length)
 
         self.cal_load_box = QtWidgets.QGroupBox("Load")
+        # self.cal_load_box.setProperty("cssClass", "cal_box")
         cal_load_form = QtWidgets.QFormLayout(self.cal_load_box)
         self.cal_load_box.setDisabled(True)
         self.load_resistance = QtWidgets.QLineEdit("50")
+        self.load_resistance.setProperty("cssClass", "cal_input")
         self.load_inductance = QtWidgets.QLineEdit("0")
+        self.load_inductance.setProperty("cssClass", "cal_input")
         self.load_capacitance = QtWidgets.QLineEdit("0")
+        self.load_capacitance.setProperty("cssClass", "cal_input")
         self.load_capacitance.setDisabled(True)  # Not yet implemented
         self.load_length = QtWidgets.QLineEdit("0")
+        self.load_length.setProperty("cssClass", "cal_input")
         cal_load_form.addRow("Resistance (\N{OHM SIGN})", self.load_resistance)
         cal_load_form.addRow("Inductance (H(e-12))", self.load_inductance)
         cal_load_form.addRow("Capacitance (F(e-12))", self.load_capacitance)
         cal_load_form.addRow("Offset Delay (ps)", self.load_length)
 
         self.cal_through_box = QtWidgets.QGroupBox("Through")
+        # self.cal_through_box.setProperty("cssClass", "cal_box")
         cal_through_form = QtWidgets.QFormLayout(self.cal_through_box)
         self.cal_through_box.setDisabled(True)
         self.through_length = QtWidgets.QLineEdit("0")
+        self.through_length.setProperty("cssClass", "cal_input")
         cal_through_form.addRow("Offset Delay (ps)", self.through_length)
 
         cal_standard_layout.addWidget(self.cal_short_box)
@@ -182,6 +201,7 @@ class CalibrationWindow(QtWidgets.QWidget):
         cal_standard_layout.addWidget(self.cal_through_box)
 
         self.cal_standard_save_box = QtWidgets.QGroupBox("Saved settings")
+        # self.cal_standard_save_box.setProperty("cssClass", "cal_box")
         cal_standard_save_layout = QtWidgets.QVBoxLayout(self.cal_standard_save_box)
         self.cal_standard_save_box.setDisabled(True)
 
diff --git a/skins/dark-colored.css b/skins/dark-colored.css
index a417dbf..3883077 100644
--- a/skins/dark-colored.css
+++ b/skins/dark-colored.css
@@ -349,3 +349,10 @@ QGroupBox {
   color: #00d074;
   font-weight: bold;
 }
+[cssClass="cal_input"] {
+  background-color: #000000;
+  color: #e1442a;
+  border: 2px groove #232223;
+  margin: 0px;
+  font-weight: bold;
+}
diff --git a/skins/light-colored.css b/skins/light-colored.css
index 155be54..410186e 100644
--- a/skins/light-colored.css
+++ b/skins/light-colored.css
@@ -355,3 +355,10 @@ QGroupBox {
   color: #000000;
   font-weight: bold;
 }
+[cssClass="cal_input"] {
+  background-color: #000000;
+  color: #e1442a;
+  border: 2px groove #232223;
+  margin: 0px;
+  font-weight: bold;
+}