diff --git a/agenda/__init__.py b/agenda/__init__.py
index 62bff02..e5ee290 100644
--- a/agenda/__init__.py
+++ b/agenda/__init__.py
@@ -56,6 +56,23 @@ config.read(config_filename)
 access_key = config.get("exchangerate", "access_key")
 data_dir = config.get("data", "dir")
 
+colors = {
+    "primary-subtle": "#cfe2ff",
+    "secondary-subtle": "#e2e3e5",
+    "success-subtle": "#d1e7dd",
+    "info-subtle": "#cff4fc",
+    "warning-subtle": "#fff3cd",
+    "danger-subtle": "#f8d7da",
+}
+
+event_type_color_map = {
+    "bank_holiday": "success-subtle",
+    "conference": "primary-subtle",
+    "us_holiday": "secondary-subtle",
+    "birthday": "info-subtle",
+    "waste_schedule": "danger-subtle",
+}
+
 
 def extract_weekday_date(html: str) -> date | None:
     """Furthest date of GWR advance ticket booking."""
@@ -651,6 +668,9 @@ def build_events_for_calendar(events: list[Event]) -> list[dict[str, typing.Any]
             "start": e.date.isoformat(),
             "end": end.isoformat(),
         }
+        if e.name in event_type_color_map:
+            item["color"] = colors[event_type_color_map[e.name]]
+            item["textColor"] = "black"
         if e.url:
             item["url"] = e.url
         items.append(item)