diff --git a/views/guide_colour.html b/views/guide_colour.html
index cbee606e5..da677a84c 100755
--- a/views/guide_colour.html
+++ b/views/guide_colour.html
@@ -379,6 +379,10 @@ <h4 class="heading-small">GOV.UK blue</h4>
 
   <h3 class="heading-medium" id="examples">Examples</h3>
   <h4 class="heading-small">Transaction end page</h4>
+  
+  <p>
+    Note that the white text on turquoise background has a contrast ratio of 3:1, so only meets the WCAG2 Level AA accessibility standard when large text is used. Make sure you use at least font size 18px, or 14px bold when using the highlight box.
+  </p>
 
   <div class="example">