Update streamlit_app.py

Update title and markdown color to white

src/streamlit_app.py

@@ -44,12 +44,14 @@ st.markdown(
 
 col1, col2, col3 = st.columns([1, 5, 1])
 with col2:
-    st.title("GFM Explainability Demo 🌎")
     st.markdown(
-    """ 
-    This app extracts t-SNE of Embeddings from image chips using :rainbow[Prithvi-EO-2.0 model]!
-    """
-)
+        "<h1 style='color:white;'>GFM Explainability Demo 🌎</h1>",
+        unsafe_allow_html=True
+    )
+    st.markdown(
+        "<p style='color:white;'>This app extracts t-SNE of Embeddings from image chips using :rainbow[Prithvi-EO-2.0 model]!</p>",
+        unsafe_allow_html=True
+    )
     
 # read csv
 chips_df = pd.read_csv("data/embeddings_df_v0.11_test.csv")