diff --git a/Passwords.cs b/Passwords.cs
index 6862852..a813a20 100644
--- a/Passwords.cs
+++ b/Passwords.cs
@@ -1,6 +1,4 @@
-using System;
-
-namespace SGB_Settings_Editor
+namespace SGB_Settings_Editor
 {
     // Convert SGB passwords to color palette
     public static class Passwords
@@ -177,8 +175,7 @@ internal static ushort change_shade(ushort base_color, int shade)
             A = (ushort)(A << 5);
             A = (ushort)((cc & 0x7c1f) | A);
             cc = A;
-            A &= 0x001f;
-            A = sub(A);
+            A = sub((ushort)(A & 0x001f));
             A = (ushort)((cc & 0x7fe0) | A);
             return A;
         }
diff --git a/README.md b/README.md
index 6d340f1..7eed8d7 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # SGB Settings Editor
 Settings Editor for Super Game Boy 1 &amp; 2, also a general SNES color conversion tool.
 
-Allows you to freely change the color palettes and game presets, switch the control type and select a different startup border. Compatible with the SGB mode of the SD2SNES / FXPAK.
+Allows you to freely change the color palettes and game presets, switch the control type and select a different startup border. Color palette passwords from the Super Game Boy can be imported and converted to RGB values. Compatible with the SGB mode of the SD2SNES / FXPAK.
 
-![screenshot](https://github.com/blzla/SGB-Palette-Editor/blob/main/screenshot.png?raw=true)
+![screenshot](https://github.com/blzla/SGB-Settings-Editor/blob/main/screenshot.png?raw=true)