X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FColorUtils.java;h=fd760862fdfcafa70938a49f2c787abbb58b7d94;hb=e0273ccaa778d70fea45dcca68b31f0cb66310f0;hp=0d726a2470613aa1bb6da09fde79fea6ac4def17;hpb=b369b306448bbec72f29b33ebe2f654589845103;p=jalview.git

diff --git a/src/jalview/util/ColorUtils.java b/src/jalview/util/ColorUtils.java
index 0d726a2..fd76086 100644
--- a/src/jalview/util/ColorUtils.java
+++ b/src/jalview/util/ColorUtils.java
@@ -59,29 +59,28 @@ public class ColorUtils
 
   }
 
-/**
-   * Returns a colour three shades darker. 
-   * 
-   * We use darker text to indicate unselected buttons, lighter text for selected. Note you can't 
-   * guarantee that darkerThan/brighterThan undo each other, as they may result in black/white.
+  /**
+   * Returns a colour three shades darker. Note you can't guarantee that
+   * brighterThan reverses this, as darkerThan may result in black.
    * 
    * @param col
    * @return
    */
-  public static Color darkerThan(Color col) {
-	  return col.darker().darker().darker();
+  public static Color darkerThan(Color col)
+  {
+    return col == null ? null : col.darker().darker().darker();
   }
 
-/**
-   * Returns a colour three shades brighter. 
+  /**
+   * Returns a colour three shades brighter. Note you can't guarantee that
+   * darkerThan reverses this, as brighterThan may result in white.
    * 
-   * We use darker text to indicate unselected buttons, lighter text for selected. Note you can't 
-   * guarantee that darkerThan/brighterThan undo each other, as they may result in black/white.
    * @param col
    * @return
    */
-  public static Color brighterThan(Color col) {
-	  return col.brighter().brighter().brighter();
+  public static Color brighterThan(Color col)
+  {
+    return col == null ? null : col.brighter().brighter().brighter();
   }
 
 }