diff --git a/src/main/python/constants.py b/src/main/python/constants.py
index c38f46e..224eafb 100644
--- a/src/main/python/constants.py
+++ b/src/main/python/constants.py
@@ -2,7 +2,13 @@ KEY_WIDTH = 40
 KEY_HEIGHT = KEY_WIDTH
 KEY_SPACING = 4
 
+KEYCODE_BTN_WIDTH = 50
+KEYCODE_BTN_HEIGHT = KEYCODE_BTN_WIDTH
+
 WINDOW_WIDTH, WINDOW_HEIGHT = 1024, 768
 
 LAYER_BTN_STYLE = "border: 1px solid black; padding: 5px"
 ACTIVE_LAYER_BTN_STYLE = "border: 1px solid black; padding: 5px; background-color: black; color: white"
+
+KEY_NORMAL_STYLE = "background-color:white; border: 1px solid black"
+KEY_ACTIVE_STYLE = "background-color:black; color: white; border: 1px solid black"
diff --git a/src/main/python/keyboard_container.py b/src/main/python/keyboard_container.py
index 2ed2c7d..849c9e0 100644
--- a/src/main/python/keyboard_container.py
+++ b/src/main/python/keyboard_container.py
@@ -5,7 +5,8 @@ from PyQt5.QtWidgets import QWidget, QHBoxLayout, QLabel, QVBoxLayout
 
 from clickable_label import ClickableLabel
 from keycodes import keycode_label, keycode_tooltip
-from constants import KEY_WIDTH, KEY_SPACING, KEY_HEIGHT, LAYER_BTN_STYLE, ACTIVE_LAYER_BTN_STYLE
+from constants import KEY_WIDTH, KEY_SPACING, KEY_HEIGHT, LAYER_BTN_STYLE, ACTIVE_LAYER_BTN_STYLE, KEY_NORMAL_STYLE, \
+    KEY_ACTIVE_STYLE
 from util import tr
 
 
@@ -114,9 +115,9 @@ class KeyboardContainer(QWidget):
             text = keycode_label(code)
             tooltip = keycode_tooltip(code)
             for widget in widgets:
-                widget.setStyleSheet('background-color:white; border: 1px solid black')
+                widget.setStyleSheet(KEY_NORMAL_STYLE)
                 if widget == self.selected_key:
-                    widget.setStyleSheet('background-color:black; color: white; border: 1px solid black')
+                    widget.setStyleSheet(KEY_ACTIVE_STYLE)
                 widget.setText(text)
                 widget.setToolTip(tooltip)
 
diff --git a/src/main/python/tabbed_keycodes.py b/src/main/python/tabbed_keycodes.py
index fa1324f..8085b4f 100644
--- a/src/main/python/tabbed_keycodes.py
+++ b/src/main/python/tabbed_keycodes.py
@@ -1,6 +1,7 @@
 from PyQt5.QtCore import pyqtSignal
 from PyQt5.QtWidgets import QTabWidget, QWidget, QPushButton
 
+from constants import KEYCODE_BTN_WIDTH, KEYCODE_BTN_HEIGHT
 from flowlayout import FlowLayout
 from keycodes import KEYCODES_BASIC, KEYCODES_ISO, KEYCODES_MACRO, KEYCODES_LAYERS, KEYCODES_SPECIAL, keycode_tooltip
 from util import tr
@@ -38,7 +39,7 @@ class TabbedKeycodes(QTabWidget):
 
         for keycode in keycodes:
             btn = QPushButton(keycode.label)
-            btn.setFixedSize(50, 50)
+            btn.setFixedSize(KEYCODE_BTN_WIDTH, KEYCODE_BTN_HEIGHT)
             btn.setToolTip(keycode_tooltip(keycode.code))
             btn.clicked.connect(lambda st, k=keycode: self.keycode_changed.emit(k.code))
             layout.addWidget(btn)