diff --git a/LICENSE b/LICENSE.md
similarity index 100%
rename from LICENSE
rename to LICENSE.md
diff --git a/_extensions/fnl/__init__.py b/_extensions/fnl/__init__.py
new file mode 100644
index 0000000..7df2feb
--- /dev/null
+++ b/_extensions/fnl/__init__.py
@@ -0,0 +1,20 @@
+"""
+Quarto HTML format with FNL branding guidelines
+
+First run `ccbr_tools quarto-add fnl`, then modify the `_quarto.yml` file with the following:
+
+```yaml
+website:
+  ...
+  page-footer:
+    background: black
+    foreground: white
+    left: |
+      [![](/_extensions/fnl/fnl-logo-dark.png){height=70px}](https://frederick.cancer.gov/research/science-areas/bioinformatics-and-computational-science/advanced-biomedical-computational-science)
+    center: |
+      Created by the
+      [CCR Collaborative Bioinformatics Resource](https://github.com/CCBR)
+
+format: fnl-html
+```
+"""
diff --git a/_extensions/fnl/_extension.yml b/_extensions/fnl/_extension.yml
new file mode 100644
index 0000000..894dd1c
--- /dev/null
+++ b/_extensions/fnl/_extension.yml
@@ -0,0 +1,12 @@
+title: fnl
+author: Kelly Sovacool
+version: 0.1.3
+quarto-required: ">=1.5.0"
+contributes:
+  formats:
+    html:
+      theme:
+        dark: [darkly, fnl-dark.scss]
+        light: [flatly, fnl-light.scss]
+      toc: true
+      code-fold: show
diff --git a/_extensions/fnl/fnl-dark.scss b/_extensions/fnl/fnl-dark.scss
new file mode 100644
index 0000000..7d32586
--- /dev/null
+++ b/_extensions/fnl/fnl-dark.scss
@@ -0,0 +1,48 @@
+// override select variables from fnl-light.scss
+/*-- scss:defaults --*/
+
+// branding guidelines
+// https://nih.sharepoint.com/:b:/r/sites/NCI-Fred/Communications/Shared%20Documents/Branding%20guidelines%20LIVE.pdf?csf=1&web=1&e=e9PrVO
+
+// primary colors
+$black: #000000;
+$white: #ffffff;
+$lime: #7cc349;
+$teal: #296b7f;
+
+//secondary colors
+$teal-light: #4e9db5;
+$teal-dark: #19424e;
+$almost-black: #03191f;
+$lime-light: #b1ee85;
+$lime-dark: #528230;
+$orange: #ecba4c;
+
+// set colors
+$primary: $teal;
+$secondary: $lime;
+
+$body-bg: $almost-black;
+$link-color: $lime;
+
+$navbar-bg: $teal-dark;
+$navbar-hl: $lime-light;
+$footer-bg: $black;
+$footer-fg: $white;
+$footer-hl: $lime-light;
+$sidebar-hl: $lime-light;
+
+$code-block-bg-alpha: -0.8;
+$code-bg-alpha: -0.8;
+$code-alpha: 0.9;
+$code-bg: $teal-dark;
+$code-color: $orange;
+
+$callout-color-tip: $lime;
+$callout-color-note: $teal-light;
+$callout-color-caution: $orange;
+$callout-color-warning: $orange;
+
+// font
+$font-family-sans-serif: "Roboto", sans-serif;
+$font-family-monospace: "Roboto Mono", monospace;
diff --git a/_extensions/fnl/fnl-light.scss b/_extensions/fnl/fnl-light.scss
new file mode 100644
index 0000000..a27a325
--- /dev/null
+++ b/_extensions/fnl/fnl-light.scss
@@ -0,0 +1,41 @@
+/*-- scss:defaults --*/
+
+// branding guidelines
+// https://nih.sharepoint.com/:b:/r/sites/NCI-Fred/Communications/Shared%20Documents/Branding%20guidelines%20LIVE.pdf?csf=1&web=1&e=e9PrVO
+
+// primary colors
+$black: #000000;
+$white: #ffffff;
+$lime: #7cc349;
+$teal: #296b7f;
+
+//secondary colors
+$teal-light: #4e9db5;
+$teal-dark: #19424e;
+$almost-black: #03191f;
+$lime-light: #b1ee85;
+$lime-dark: #528230;
+$orange: #ecba4c;
+
+// set colors
+$primary: $teal-dark;
+$secondary: $lime;
+$success: $lime-dark;
+$warning: $orange;
+$info: $teal-light;
+
+$link-color: $teal;
+
+$footer-bg: $black;
+$footer-fg: $white;
+
+$code-color: $lime-dark;
+
+$callout-color-tip: $lime-dark;
+$callout-color-note: $teal-light;
+$callout-color-caution: $orange;
+$callout-color-warning: $orange;
+
+// font
+$font-family-sans-serif: "Roboto", sans-serif;
+$font-family-monospace: "Roboto Mono", monospace;
diff --git a/_extensions/fnl/fnl-logo-dark.png b/_extensions/fnl/fnl-logo-dark.png
new file mode 100644
index 0000000..d9b9c7c
Binary files /dev/null and b/_extensions/fnl/fnl-logo-dark.png differ
diff --git a/_extensions/fnl/fnl-logo-light.png b/_extensions/fnl/fnl-logo-light.png
new file mode 100644
index 0000000..d6eb422
Binary files /dev/null and b/_extensions/fnl/fnl-logo-light.png differ
diff --git a/_quarto.yml b/_quarto.yml
index 1ced573..0b41178 100644
--- a/_quarto.yml
+++ b/_quarto.yml
@@ -31,18 +31,20 @@ website:
             file: .github/CONTRIBUTING.md
           - text: Changelog
             file: CHANGELOG.md
+          - text: License
+            file: LICENSE.md
       - icon: github
         href: https://github.com/CCBR/nf-modules
+
   page-footer:
+    background: black
+    foreground: white
     left: |
+      [![](/_extensions/fnl/fnl-logo-dark.png){height=70px}](https://frederick.cancer.gov/research/science-areas/bioinformatics-and-computational-science/advanced-biomedical-computational-science)
+    center: |
       Created by the
       [CCR Collaborative Bioinformatics Resource](https://github.com/CCBR)
 
 execute:
   freeze: auto
-format:
-  html:
-    theme:
-      dark: solar
-      light: yeti
-    embed-resources: true
+format: fnl-html