diff --git a/looptrace_regionals_vis/colors.py b/looptrace_regionals_vis/colors.py
index 8910a26..e401b12 100644
--- a/looptrace_regionals_vis/colors.py
+++ b/looptrace_regionals_vis/colors.py
@@ -6,4 +6,4 @@
 IBM_PURPLE = "#785EF0"  # for proximity discards
 IBM_PINK = "#DC267F"  # for accepted singletons
 IBM_ORANGE = "#FE6100"  # for non-nuclear
-IBM_YELLOW = "FFB000"  # for accepted mergers
+IBM_YELLOW = "#FFB000"  # for accepted mergers