Update app.py

app.py

@@ -63,7 +63,7 @@ Plots represent Lasso, MultiTaskLasso and Ground truth time series
 with gr.Blocks(theme=gr.themes.Glass(primary_hue=gr.themes.colors.gray, 
                secondary_hue=gr.themes.colors.sky,
                text_size=gr.themes.sizes.text_lg),
-               css=".gradio-container {background-color: zinc, font-size: 2rem }") as demo:
+               css=".gradio-container {background-color: #335960 }") as demo:
     
     gr.Markdown('''
             <div>