Update app.py

app.py

@@ -95,9 +95,9 @@ def plot_volatility_smile(options_data, recent_price, ticker):
     avg_iv_by_strike_puts = puts_data.groupby("strike")["implied_volatility"].mean()
 
     fig.add_trace(go.Scatter(x=avg_iv_by_strike_calls.index, y=avg_iv_by_strike_calls.values, mode='lines',
-                             line=dict(color='black', dash='dash'), name='Avg. IV by Strike (Calls)'), row=1, col=1)
+                             line=dict(color='white', dash='dash'), name='Avg. IV by Strike (Calls)'), row=1, col=1)
     fig.add_trace(go.Scatter(x=avg_iv_by_strike_puts.index, y=avg_iv_by_strike_puts.values, mode='lines',
-                             line=dict(color='black', dash='dash'), name='Avg. IV by Strike (Puts)', showlegend=False), row=1, col=2)
+                             line=dict(color='white', dash='dash'), name='Avg. IV by Strike (Puts)', showlegend=False), row=1, col=2)
 
     overall_avg_iv_calls = calls_data["implied_volatility"].mean()
     overall_avg_iv_puts = puts_data["implied_volatility"].mean()