Update app.py

app.py

@@ -114,7 +114,7 @@ with right_col:
     
     # Plot function and gradient descent steps
     fig = go.Figure()
-    fig.add_trace(go.Scatter(x=x_range, y=y_range, mode='lines', name='Function'))
+    fig.add_trace(go.Scatter(x=x_range, y=y_range, mode='lines', name='Function',line=dict(color='orange')))
     
     # Add current point
     x_current, y_current = st.session_state.history[st.session_state.current_index]
@@ -122,7 +122,7 @@ with right_col:
     
     # Add tangent line
     tangent_y = calculate_tangent(function_input, x_current, x_range)
-    fig.add_trace(go.Scatter(x=x_range, y=tangent_y, mode='lines', name='Tangent Line', line=dict(dash='dash')))
+    fig.add_trace(go.Scatter(x=x_range, y=tangent_y, mode='lines', name='Tangent Line', line=dict(dash='dash',color='green')))
     
     # Layout adjustments
     fig.update_layout(