diff --git a/DP2/300_Science_demos/303_Galaxies/303_1_Galaxy_photometry.ipynb b/DP2/300_Science_demos/303_Galaxies/303_1_Galaxy_photometry.ipynb
index 7dcccf77..e7e03fd8 100644
--- a/DP2/300_Science_demos/303_Galaxies/303_1_Galaxy_photometry.ipynb
+++ b/DP2/300_Science_demos/303_Galaxies/303_1_Galaxy_photometry.ipynb
@@ -774,10 +774,10 @@
     "\n",
     "ax2.hist((cmodel_mag-sersic_mag), orientation=\"horizontal\",\n",
     "         bins=np.linspace(ylims[0], ylims[1], 50), align='mid',\n",
-    "         histtype=\"step\", color='red', stacked=True, fill=False, label='Sersic')\n",
+    "         histtype=\"step\", color=colors[2], stacked=True, fill=False, label='Sersic')\n",
     "ax2.hist((cmodel_mag-kron_mag), orientation=\"horizontal\",\n",
     "         bins=np.linspace(ylims[0], ylims[1], 50), align='mid',\n",
-    "         histtype=\"step\", color='blue', stacked=True, fill=False, label='Kron')\n",
+    "         histtype=\"step\", color=colors[0], stacked=True, fill=False, label='Kron')\n",
     "\n",
     "ax2.set_ylim(ylims)\n",
     "ax2.axhline(0, linestyle='--', color='k')\n",