diff --git a/android/assets/themes/bandw.theme b/android/assets/themes/bandw.theme
index 87d7119..d28583e 100644
--- a/android/assets/themes/bandw.theme
+++ b/android/assets/themes/bandw.theme
@@ -2,7 +2,7 @@
     "name": "Black et White",
     "price": 20,
     "colors": {
-        "background": "0a0a0aff",
+        "background": "000000ff",
         "foreground": "202020ff",
         "buttons": [
             "f0f0f0ff",
@@ -10,7 +10,7 @@
             "f0f0f0ff",
             "f0f0f0ff"
         ],
-        "empty_cell": "000000ff",
+        "empty_cell": "202020ff",
         "cells": [
             "f2f2f2ff", "f2f2f2ff", "f2f2f2ff",
             "f2f2f2ff", "f2f2f2ff", "f2f2f2ff", "f2f2f2ff",
diff --git a/android/assets/themes/underwater.theme b/android/assets/themes/underwater.theme
index 6f27107..ff6103f 100644
--- a/android/assets/themes/underwater.theme
+++ b/android/assets/themes/underwater.theme
@@ -12,7 +12,7 @@
         ],
         "empty_cell": "0066ffff",
         "cells": [
-            "37c871ff", "2ad4ffff", "0000d4ff",
+            "37c871ff", "2ad4ffff", "00ffeeff",
             "00ffccff", "5599ffff", "87cddeff", "80b3ffff",
             "00ff66ff", "00d4aaff"
         ],
diff --git a/android/assets/ui/x1.0/cells/round.png b/android/assets/ui/x1.0/cells/round.png
deleted file mode 100644
index 8555cfd..0000000
Binary files a/android/assets/ui/x1.0/cells/round.png and /dev/null differ
diff --git a/android/assets/ui/x1.25/cells/round.png b/android/assets/ui/x1.25/cells/round.png
deleted file mode 100644
index bd5b071..0000000
Binary files a/android/assets/ui/x1.25/cells/round.png and /dev/null differ
diff --git a/android/assets/ui/x1.5/cells/round.png b/android/assets/ui/x1.5/cells/round.png
deleted file mode 100644
index ae0481b..0000000
Binary files a/android/assets/ui/x1.5/cells/round.png and /dev/null differ
diff --git a/android/assets/ui/x2.0/cells/round.png b/android/assets/ui/x2.0/cells/round.png
deleted file mode 100644
index 8574550..0000000
Binary files a/android/assets/ui/x2.0/cells/round.png and /dev/null differ
diff --git a/android/assets/ui/x4.0/cells/round.png b/android/assets/ui/x4.0/cells/round.png
deleted file mode 100644
index 595f57d..0000000
Binary files a/android/assets/ui/x4.0/cells/round.png and /dev/null differ