diff --git a/geom/demos/sat.py b/geom/demos/sat.py
index 403c365..8e10187 100644
--- a/geom/demos/sat.py
+++ b/geom/demos/sat.py
@@ -51,7 +51,7 @@ class SeparatingAxisTheorem:
             # separating line
             dist = scale(*normal,
                          (min1 if min1 > min2 else min2) - overlap * 0.5)
-            line(surface, BLUE,
+            line(surface, CYAN,
                  add(*dist, *offset),
                  add(*dist, *scale(*lnormal(*normal), 1000)))