Fix title color

src/interface.py

@@ -13,11 +13,11 @@ def create_interface(diagram_types, respond):
     with gr.Blocks(title="PlantUML Agent", theme=gr.themes.Soft()) as demo:
         gr.HTML(
             """
-            <h1 style="text-align: center; color: #333;">PlantUML Agent</h1>
+            <h1 style="text-align: center; color: white;">PlantUML Agent</h1>
             <div style="text-align: center; margin-bottom: 20px;">
                 <img src="https://repository-images.githubusercontent.com/553868400/2f7375d8-c2ee-44fe-81d0-a8a29ec284da" alt="PlantUML Logo" style="height: 60px;">
             </div>
-            <p style="text-align: center; font-size: 1.1em; color: #555;">
+            <p style="text-align: center; font-size: 1.1em; color: white;">
                 Generate UML diagrams using <a href="https://plantuml.com" target="_blank" style="color: #1A73E8; text-decoration: none;">PlantUML</a> syntax with the help of an AI agent.
             </p>
             <hr style="border: 0; height: 1px; background: #eee; margin: 20px 0;">