X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FColorUtils.java;fp=src%2Fjalview%2Futil%2FColorUtils.java;h=fd760862fdfcafa70938a49f2c787abbb58b7d94;hb=55fc8f004dac252b5b89ac91cf506e4844a6b1da;hp=f108da1fed49c1470ceb613ad202f8ff092b93bb;hpb=2e77b309193604aed37d838e916ae6b454be3431;p=jalview.git

diff --git a/src/jalview/util/ColorUtils.java b/src/jalview/util/ColorUtils.java
index f108da1..fd76086 100644
--- a/src/jalview/util/ColorUtils.java
+++ b/src/jalview/util/ColorUtils.java
@@ -59,4 +59,28 @@ public class ColorUtils
 
   }
 
+  /**
+   * 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 == null ? null : col.darker().darker().darker();
+  }
+
+  /**
+   * Returns a colour three shades brighter. Note you can't guarantee that
+   * darkerThan reverses this, as brighterThan may result in white.
+   * 
+   * @param col
+   * @return
+   */
+  public static Color brighterThan(Color col)
+  {
+    return col == null ? null : col.brighter().brighter().brighter();
+  }
+
 }