diff --git a/config/design-tokens/fonts.json b/config/design-tokens/fonts.json
index 87a129a..14ffe63 100644
--- a/config/design-tokens/fonts.json
+++ b/config/design-tokens/fonts.json
@@ -40,5 +40,21 @@
         "weight": 650
       }
     }
+  },
+  "monospace": {
+    "family": "IBM Plex Mono",
+    "format": "truetype",
+    "weights": {
+      "Regular": {
+        "path": "/ibmplexmono/IBMPlexMono-Regular.ttf",
+        "font-style": "normal",
+        "weight": 400
+      },
+      "Italic": {
+        "path": "/ibmplexmono/IBMPlexMono-Italic.ttf",
+        "font-style": "italic",
+        "weight": 400
+      }
+    }
   }
 }
diff --git a/src/assets/fonts/ibmplexmono/IBMPlexMono-Italic.ttf b/src/assets/fonts/ibmplexmono/IBMPlexMono-Italic.ttf
new file mode 100644
index 0000000..3cb28a3
Binary files /dev/null and b/src/assets/fonts/ibmplexmono/IBMPlexMono-Italic.ttf differ
diff --git a/src/assets/fonts/ibmplexmono/IBMPlexMono-Regular.ttf b/src/assets/fonts/ibmplexmono/IBMPlexMono-Regular.ttf
new file mode 100644
index 0000000..81ca3dc
Binary files /dev/null and b/src/assets/fonts/ibmplexmono/IBMPlexMono-Regular.ttf differ
diff --git a/src/colophon.md b/src/colophon.md
index 75d4a78..f2bed8b 100644
--- a/src/colophon.md
+++ b/src/colophon.md
@@ -35,7 +35,7 @@ Code formatting is applied by [Prism][prismjs] and uses a tweaked version of the
 
 ## Design
 
-Headings are using the [Anek Latin][aneklatin] font, and the body font is [iA Writer Quattro][iawriterquattro].
+Headings are using the [Anek Latin][aneklatin] font, and the body font is [iA Writer Quattro][iawriterquattro]. Monospace font is [IBM Plex Mono][ibmplexmono].
 
 The colour palette is viewable on the [styleguide][styleguide] page.
 
@@ -90,3 +90,4 @@ I've done my best to show where I found any code I did not write myself.
 [everylayout]: https://every-layout.dev
 [prismjs]: https://prismjs.com
 [tokyonight]: https://github.com/folke/tokyonight.nvim
+[ibmplexmono]: https://fonts.google.com/specimen/IBM+Plex+Mono
diff --git a/src/css/global/global-styles.css b/src/css/global/global-styles.css
index fe595a8..aee0fbb 100644
--- a/src/css/global/global-styles.css
+++ b/src/css/global/global-styles.css
@@ -123,9 +123,13 @@ hr {
   color: var(--color-surface);
 }
 
+code {
+  font-family: var(--font-family-monospace);
+}
+
 :not(pre) > code {
   background-color: var(--color-surface);
-  border-radius: var(--spacing-\0.5);
+  border-radius: var(--spacing-0\.25);
   padding-block: 0.15em;
   padding-inline: 0.25em;
 }