diff --git a/content/markdown.md b/content/markdown.md
index 4c001dd..ececbe9 100644
--- a/content/markdown.md
+++ b/content/markdown.md
@@ -16,9 +16,15 @@ fn main() {
 
 > We're all hurtling towards death. Yet here we are, for the moment, alive. Each of us knowing we're going to die. Each of us secretly believing we won't.
 
-— Charlie Kaufman, Synecdoche, New York 
+— Charlie Kaufman, Synecdoche, New York
 
 ## Code tags
 
-Lorem ipsum `dolor` sit amet, `consectetur adipiscing` elit. 
+Lorem ipsum `dolor` sit amet, `consectetur adipiscing` elit.
 `Lorem ipsum dolor sit amet, consectetur adipiscing elit.`
+
+## Invertable image
+
+This image inverts when switching to dark mode. This isn't very useful for photographs, but works great for diagrams, line drawings, graphs…
+
+{{ invertable_image(src="$BASE_URL/img/graph.png", alt="Invertable graph") }}
diff --git a/static/img/graph.png b/static/img/graph.png
new file mode 100644
index 0000000..072970e
Binary files /dev/null and b/static/img/graph.png differ