Update app.py

app.py

@@ -32,10 +32,10 @@ realtime_update = st.sidebar.checkbox("Update in realtime", True)
 
 # Create a canvas component
 canvas_result = st_canvas(
-    fill_color="rgba(0, 0, 0, 0)",  # Fixed fill color with some opacity
+    fill_color="rgb(0, 0, 0)",  # Fixed fill color with some opacity
     stroke_width=stroke_width,
-    stroke_color="rgba(255, 255, 255, 0)",
-    background_color="rgba(0, 0, 0, 0)",
+    stroke_color="rgb(255, 255, 255)",
+    background_color="rgb(0, 0, 0)",
     background_image=None,
     update_streamlit=realtime_update,
     height=150,