diff --git a/src/args.jl b/src/args.jl
index 1907195f..08fce1b7 100644
--- a/src/args.jl
+++ b/src/args.jl
@@ -377,7 +377,7 @@ const _subplot_defaults = KW(
     :bottom_margin            => :match,
     :subplot_index            => -1,
     :colorbar_title                  => "",
-    :colorbar_titlefontsize          => 16,
+    :colorbar_titlefontsize          => 10,
     :colorbar_title_location         => :center,           # also :left or :right
     :colorbar_fontfamily             => :match,
     :colorbar_titlefontfamily        => :match,