diff --git a/pympress/talk_time.py b/pympress/talk_time.py
index 5f72fefc..5496a17b 100644
--- a/pympress/talk_time.py
+++ b/pympress/talk_time.py
@@ -132,7 +132,7 @@ def update_time_color(self, remaining):
             position = (remaining - prev_time) / (timestamp - prev_time)
             color_spec = '* {{color: mix({}, {}, {})}}'.format(prev_color.to_string(), color.to_string(), position)
         else:
-            color_spec = '* {color: {}}'.format(color.to_string())
+            color_spec = '* {{color: {}}}'.format(color.to_string())
 
         self.color_override.load_from_data(color_spec.encode('ascii'))