feat: Update bar color for transaction visualizations in the dashboard

app_trans_new.py

@@ -235,7 +235,12 @@ def create_transcation_visualizations():
     fig_tx_chain = px.bar(
         daily_counts,
         barmode="stack",
-        title="Chain Daily Activity: Transactions"
+        title="Chain Daily Activity: Transactions",
+        color_discrete_map={
+            "optimism": "red",
+            "ethereum": "darkgreen",
+            "base": "blue"
+        }
     )
     fig_tx_chain.update_layout(
         xaxis_title="Date",