diff --git a/inst/pages/composition.qmd b/inst/pages/composition.qmd
index a8d90db5..995ed649 100644
--- a/inst/pages/composition.qmd
+++ b/inst/pages/composition.qmd
@@ -88,7 +88,7 @@ heatmap <- sechm(
     tse, assayName = "clr_z", features=rownames(tse),
     show_rownames = TRUE, show_colnames = TRUE,
     row_names_gp = gpar(fontsize = 6), column_names_gp = gpar(fontsize = 8),
-    breaks = 1
+    breaks = 1, hmcols = c("blue", "white", "red")
     )
 heatmap
 ```
@@ -133,7 +133,7 @@ neatmap <- sechm(
     show_rownames = TRUE, show_colnames = TRUE,
     do.scale=FALSE, cluster_rows=FALSE, sortRowsOn = NULL,
     row_names_gp = gpar(fontsize = 6), column_names_gp = gpar(fontsize = 8),
-    breaks = 1
+    breaks = 1, hmcols = c("blue", "white", "red")
     )
 neatmap
 ```