diff --git a/android/app/src/main/java/com/eddy/atomrelay/MainActivity.kt b/android/app/src/main/java/com/eddy/atomrelay/MainActivity.kt
index 5e308aa..7c5f50f 100644
--- a/android/app/src/main/java/com/eddy/atomrelay/MainActivity.kt
+++ b/android/app/src/main/java/com/eddy/atomrelay/MainActivity.kt
@@ -3,7 +3,7 @@ package com.eddy.atomrelay
 
 import android.content.Intent
 import android.content.pm.PackageManager
-import android.graphics.drawable.GradientDrawable
+import android.graphics.Color
 import android.os.Bundle
 import android.os.Handler
 import android.os.Looper
@@ -147,25 +147,20 @@ class MainActivity : AppCompatActivity(), BleCallbacks {
     private fun setupRelayButton() {
         relay1Button.setOnClickListener(null)
         loadButtonLabel(relay1Button, PrefsHelper.PREF_LABEL1, R.string.button_hold)
-
-        val defaultBg = GradientDrawable().apply {
-            setColor(ContextCompat.getColor(this@MainActivity, R.color.colorPrimary))
-            cornerRadius = 8f * resources.displayMetrics.density
-        }
-        val pressedBg = GradientDrawable().apply {
-            setColor(ContextCompat.getColor(this@MainActivity, R.color.colorAccent))
-            cornerRadius = 8f * resources.displayMetrics.density
-        }
+        val a = Color.rgb(0xE0, 0xE0, 0xE0)
+        val b = ContextCompat.getColor(this, R.color.colorAccent)
+        relay1Button.backgroundTintList = null
+        relay1Button.setBackgroundColor(a)
         relay1Button.setOnTouchListener { _, event ->
             when (event.action) {
                 MotionEvent.ACTION_DOWN -> {
                     manager.sendRelayCommand(0x01.toByte())
-                    relay1Button.background = pressedBg
+                    relay1Button.setBackgroundColor(b)
                     true
                 }
                 MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
                     manager.sendRelayCommand(0x00.toByte())
-                    relay1Button.background = defaultBg
+                    relay1Button.setBackgroundColor(a)
                     true
                 }
                 else -> false
@@ -176,25 +171,20 @@ class MainActivity : AppCompatActivity(), BleCallbacks {
     private fun setupRelay2Button() {
         relay2Button.setOnClickListener(null)
         loadButtonLabel(relay2Button, PrefsHelper.PREF_LABEL2, R.string.button_hold)
-
-        val defaultBg = GradientDrawable().apply {
-            setColor(ContextCompat.getColor(this@MainActivity, R.color.colorPrimary))
-            cornerRadius = 8f * resources.displayMetrics.density
-        }
-        val pressedBg = GradientDrawable().apply {
-            setColor(ContextCompat.getColor(this@MainActivity, R.color.colorAccent))
-            cornerRadius = 8f * resources.displayMetrics.density
-        }
+        val a = Color.rgb(0xE0, 0xE0, 0xE0)
+        val b = ContextCompat.getColor(this, R.color.colorAccent)
+        relay2Button.backgroundTintList = null
+        relay2Button.setBackgroundColor(a)
         relay2Button.setOnTouchListener { _, event ->
             when (event.action) {
                 MotionEvent.ACTION_DOWN -> {
                     manager.sendRelayCommand(0x02.toByte())
-                    relay2Button.background = pressedBg
+                    relay2Button.setBackgroundColor(b)
                     true
                 }
                 MotionEvent.ACTION_UP, MotionEvent.ACTION_CANCEL -> {
                     manager.sendRelayCommand(0x03.toByte())
-                    relay2Button.background = defaultBg
+                    relay2Button.setBackgroundColor(a)
                     true
                 }
                 else -> false