diff --git a/docs/cookery/book.typ b/docs/cookery/book.typ
index e25c4cff..94acecc8 100644
--- a/docs/cookery/book.typ
+++ b/docs/cookery/book.typ
@@ -1,8 +1,11 @@
 
 #import "@preview/book:0.2.2": *
+#import "./templates/page.typ": main-color
 
 #show: book
 
+#let main-color = main-color
+
 // #let section-numbers = state("book-section", ())
 #let section-numbers = ()
 
diff --git a/docs/cookery/templates/page.typ b/docs/cookery/templates/page.typ
index f1c92517..cebba173 100644
--- a/docs/cookery/templates/page.typ
+++ b/docs/cookery/templates/page.typ
@@ -100,6 +100,8 @@
   // set text style
   set text(font: main-font, size: 16pt, fill: main-color, lang: "en")
 
+  set line(stroke: main-color)
+
   // render a dash to hint headings instead of bolding it.
   show heading : set text(weight: "regular") if is-web-target
   show heading : it => locate(loc => {