diff --git a/autodoc/doc_state.py b/autodoc/doc_state.py
index a517f32..4ddd47b 100644
--- a/autodoc/doc_state.py
+++ b/autodoc/doc_state.py
@@ -413,7 +413,7 @@ def __process_gamds__(name, cls, signals, edges):
             "</td></tr>"
         )
     if node:
-        label = f"""<table border="0" cellpadding="4" cellborder="1" cellspacing="0" bgcolor="#eee">
+        label = f"""<table border="0" cellpadding="4" cellborder="1" cellspacing="0" bgcolor="#eeeeee">
             <tr><td><b>{name}</b><br/>{cls}</td></tr>
             {node}
         </table>
@@ -561,7 +561,7 @@ def __simple_gam__(label, obj):
     id = f"fn{doc.format_name(label)}"
     style = "style=rounded"
     if cls == "IOGAM":
-        style = 'style="rounded,filled", fillcolor="#eee"'
+        style = 'style="rounded,filled", fillcolor="#eeeeee"'
     elif cls == "MessageGAM":
         style = 'style="rounded,filled", fillcolor=lightyellow'
     if "InputSignals" in obj: