diff --git a/src/MuTalk-Utilities/MTMatrix.class.st b/src/MuTalk-Utilities/MTMatrix.class.st
index a72876a..7010207 100644
--- a/src/MuTalk-Utilities/MTMatrix.class.st
+++ b/src/MuTalk-Utilities/MTMatrix.class.st
@@ -244,6 +244,9 @@ MTMatrix >> initializeHeatmap [
 	heatmap := RSHeatmap new.
 	heatmap labelShapeCell labelShape bold.
 	heatmap shape extent: 50 @ 20.
+	heatmap colorPalette: (NSScale linear range: {
+				 Color yellow.
+				 Color red }).
 	^ heatmap
 ]