diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index f2a75b33..3bbfe5d0 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -224,3 +224,6 @@
 
 - Evgeni Burovski
   Adaptation of ImageJ 3D skeletonization algorithm.
+
+- Alex Izvorski
+  Color spaces