diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java
index 31c0025..2b998ed 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java
@@ -111,13 +111,14 @@ public class CommandCopy implements TabExecutor {
     private boolean copyNextGenerationBook(BookMeta bookMeta, Player player, int copies) {
         //Copy the vanilla behavior of refusing copying any further
         if (bookMeta.getGeneration() == BookMeta.Generation.COPY_OF_COPY) {
-            player.sendMessage("You cannot copy this book any further. You must have the original or a direct copy.");
+            BooksWithoutBorders.sendErrorMessage(player, "You cannot copy this book any further. " +
+                    "You must have the original or a direct copy.");
             return false;
         }
         //Make sure the player can fit the book in their inventory
         int nextAvailableSlot = player.getInventory().firstEmpty();
         if (nextAvailableSlot == -1) {
-            player.sendMessage("You need an available slot in your inventory.");
+            BooksWithoutBorders.sendErrorMessage(player, "You need an available slot in your inventory.");
             return false;
         }
         //Make sure the player can pay for the copying
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/listener/SignEventListener.java b/src/main/java/net/knarcraft/bookswithoutborders/listener/SignEventListener.java
index 0ba81fa..709325e 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/listener/SignEventListener.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/listener/SignEventListener.java
@@ -185,7 +185,8 @@ public class SignEventListener implements Listener {
      */
     private void generateGiveSign(SignChangeEvent event, String[] lines, Player player) {
         if (lines[2].length() > 13 || lines[3].length() > 13) {
-            player.sendMessage(ChatColor.RED + "[Give] signs' 3rd and 4th lines must be 13 characters or less!");
+            BooksWithoutBorders.sendErrorMessage(player,
+                    "[Give] signs' 3rd and 4th lines must be 13 characters or less!");
             markGiveSignValidity(event, false);
             return;
         }
@@ -265,7 +266,7 @@ public class SignEventListener implements Listener {
 
         player.getInventory().setItem(hand, newBook);
         player.closeInventory();
-        player.sendMessage(ChatColor.GREEN + "Book auto-decrypted!");
+        BooksWithoutBorders.sendSuccessMessage(player, "Book auto-decrypted!");
     }
 
     /**
@@ -316,9 +317,9 @@ public class SignEventListener implements Listener {
 
         if (newBook != null) {
             player.getInventory().addItem(newBook);
-            player.sendMessage(ChatColor.GREEN + "Received book!");
+            BooksWithoutBorders.sendSuccessMessage(player, "Received book!");
         } else {
-            player.sendMessage(ChatColor.RED + "Book failed to load!");
+            BooksWithoutBorders.sendErrorMessage(player, "Book failed to load!");
         }
     }