diff --git a/src/main/java/fr/pandacube/java/util/ColorUtil.java b/src/main/java/fr/pandacube/java/util/ColorUtil.java
deleted file mode 100644
index 45fe490..0000000
--- a/src/main/java/fr/pandacube/java/util/ColorUtil.java
+++ /dev/null
@@ -1,49 +0,0 @@
-package fr.pandacube.java.util;
-
-import java.awt.Color;
-import java.util.ArrayList;
-import java.util.List;
-
-public class ColorUtil {
-	
-	/*
-	 * Rainbow
-	 */
-	private static List<Color> rainbowColors = new ArrayList<>();
-	
-	/**
-	 * Get a rainbow color
-	 * @param variation from 0 (include) to 1 (exclude).
-	 * 0 is red, 1/6 is yellow, 2/6 is green, 3/6 is cyan, 4/6 is blue, 5/6 is magenta
-	 * @return
-	 */
-	public static Color getRainbowColor(double variation) {
-		synchronized (rainbowColors) {
-			if (rainbowColors.isEmpty()) {
-				for (int g=0; g<255; g++) rainbowColors.add(new Color(255, g, 0));
-				for (int r=255; r>0; r--) rainbowColors.add(new Color(r, 255, 0));
-				for (int b=0; b<255; b++) rainbowColors.add(new Color(0, 255, b));
-				for (int g=255; g>0; g--) rainbowColors.add(new Color(0, g, 255));
-				for (int r=0; r<255; r++) rainbowColors.add(new Color(r, 0, 255));
-				for (int b=255; b>0; b--) rainbowColors.add(new Color(255, 0, b));
-			}
-		}
-		
-		while (variation >= 1) variation -= 1d;
-		while (variation < 0)  variation += 1d;
-		
-		return rainbowColors.get((int)(variation * rainbowColors.size()));
-	}
-	
-	
-	
-	
-	
-	
-	
-	
-	
-	
-	
-
-}