Use the original value in the error

Author: TBlueF

src/main/java/de/bluecolored/bluemap/api/math/Color.java

@@ -128,15 +128,16 @@ public float getAlpha() {
         return a;
     }
 
-    private static int parseColorString(String val) {
+    private static int parseColorString(String value) {
+        String val = value;
         if (val.charAt(0) == '#') {
             val = val.substring(1);
             if (val.length() == 3) val = val + "f";
             if (val.length() == 4) val = "" +
                     val.charAt(0) + val.charAt(0) + val.charAt(1) + val.charAt(1) +
                     val.charAt(2) + val.charAt(2) + val.charAt(3) + val.charAt(3);
             if (val.length() == 6) val = val + "ff";
-            if (val.length() != 8) throw new NumberFormatException("Invalid color format: '" + val + "'!");
+            if (val.length() != 8) throw new NumberFormatException("Invalid color format: '" + value + "'!");
             val = val.substring(6, 8) + val.substring(0, 6); // move alpha to front
             return Integer.parseUnsignedInt(val, 16);
         }