diff --git a/docs/.gitignore b/docs/.gitignore
index f40fbd8..918de83 100644
--- a/docs/.gitignore
+++ b/docs/.gitignore
@@ -3,3 +3,4 @@ _site
 .jekyll-cache
 .jekyll-metadata
 vendor
+Gemfile.lock
diff --git a/docs/_config.yml b/docs/_config.yml
index 60d34c4..baaf9f6 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -37,6 +37,8 @@ plugins:
 header_pages:
   - about.md
 
+color_scheme: nhs
+
 # Exclude from processing.
 # The following items will not be processed, by default.
 # Any item listed under the `exclude:` key here will be automatically added to
diff --git a/docs/_sass/color_schemes/example-variables.scss b/docs/_sass/color_schemes/example-variables.scss
new file mode 100644
index 0000000..dd87178
--- /dev/null
+++ b/docs/_sass/color_schemes/example-variables.scss
@@ -0,0 +1,137 @@
+//Reference Links
+
+$color-scheme: dark;
+$body-background-color: $grey-dk-300;
+$body-heading-color: $grey-lt-000;
+$body-text-color: $grey-lt-300;
+$link-color: $blue-000;
+$nav-child-link-color: $grey-dk-000;
+$sidebar-color: $grey-dk-300;
+$base-button-color: $grey-dk-250;
+$btn-primary-color: $blue-200;
+$code-background-color: #31343f; // OneDarkJekyll default for syntax-one-dark-vivid
+$code-linenumber-color: #dee2f7; // OneDarkJekyll .nf for syntax-one-dark-vivid
+$feedback-color: darken($sidebar-color, 3%);
+$table-background-color: $grey-dk-250;
+$search-background-color: $grey-dk-250;
+$search-result-preview-color: $grey-dk-000;
+$border-color: $grey-dk-200;
+
+
+// To be set in colour scheme
+
+// prettier-ignore
+$body-font-family: system-ui, -apple-system, blinkmacsystemfont, "Segoe UI",
+  roboto, "Helvetica Neue", arial, sans-serif, "Segoe UI Emoji" !default;
+$mono-font-family: "SFMono-Regular", menlo, consolas, monospace !default;
+$root-font-size: 16px !default; // DEPRECATED: previously base font-size for rems
+$body-line-height: 1.4 !default;
+$content-line-height: 1.6 !default;
+$body-heading-line-height: 1.25 !default;
+
+// Font size
+// `-sm` suffix is the size at the small (and above) media query
+
+$font-size-1: 0.5625rem !default;
+$font-size-1-sm: 0.625rem !default;
+$font-size-2: 0.6875rem !default; // h4 - uppercased!, h6 not uppercased, text-small
+$font-size-3: 0.75rem !default; // h5
+$font-size-4: 0.875rem !default;
+$font-size-5: 1rem !default; // h3
+$font-size-6: 1.125rem !default; // h2
+$font-size-7: 1.5rem !default;
+$font-size-8: 2rem !default; // h1
+$font-size-9: 2.25rem !default;
+$font-size-10: 2.625rem !default;
+$font-size-10-sm: 3rem !default;
+
+// Colors
+
+$white: #fff !default;
+$grey-dk-000: #959396 !default;
+$grey-dk-100: #5c5962 !default;
+$grey-dk-200: #44434d !default;
+$grey-dk-250: #302d36 !default;
+$grey-dk-300: #27262b !default;
+$grey-lt-000: #f5f6fa !default;
+$grey-lt-100: #eeebee !default;
+$grey-lt-200: #ecebed !default;
+$grey-lt-300: #e6e1e8 !default;
+$purple-000: #7253ed !default;
+$purple-100: #5e41d0 !default;
+$purple-200: #4e26af !default;
+$purple-300: #381885 !default;
+$blue-000: #2c84fa !default;
+$blue-100: #2869e6 !default;
+$blue-200: #264caf !default;
+$blue-300: #183385 !default;
+$green-000: #41d693 !default;
+$green-100: #11b584 !default;
+$green-200: #009c7b !default;
+$green-300: #026e57 !default;
+$yellow-000: #ffeb82 !default;
+$yellow-100: #fadf50 !default;
+$yellow-200: #f7d12e !default;
+$yellow-300: #e7af06 !default;
+$red-000: #f77e7e !default;
+$red-100: #f96e65 !default;
+$red-200: #e94c4c !default;
+$red-300: #dd2e2e !default;
+
+// Spacing
+
+$spacing-unit: 1rem; // 1rem == 16px
+
+$spacers: (
+  sp-0: 0,
+  sp-1: $spacing-unit * 0.25,
+  sp-2: $spacing-unit * 0.5,
+  sp-3: $spacing-unit * 0.75,
+  sp-4: $spacing-unit,
+  sp-5: $spacing-unit * 1.5,
+  sp-6: $spacing-unit * 2,
+  sp-7: $spacing-unit * 2.5,
+  sp-8: $spacing-unit * 3,
+  sp-9: $spacing-unit * 3.5,
+  sp-10: $spacing-unit * 4,
+) !default;
+$sp-1: map-get($spacers, sp-1) !default; // 0.25 rem == 4px
+$sp-2: map-get($spacers, sp-2) !default; // 0.5  rem == 8px
+$sp-3: map-get($spacers, sp-3) !default; // 0.75 rem == 12px
+$sp-4: map-get($spacers, sp-4) !default; // 1    rem == 16px
+$sp-5: map-get($spacers, sp-5) !default; // 1.5  rem == 24px
+$sp-6: map-get($spacers, sp-6) !default; // 2    rem == 32px
+$sp-7: map-get($spacers, sp-7) !default; // 2.5  rem == 40px
+$sp-8: map-get($spacers, sp-8) !default; // 3    rem == 48px
+$sp-9: map-get($spacers, sp-9) !default; // 3.5  rem == 56px
+$sp-10: map-get($spacers, sp-10) !default; // 4  rem == 64px
+
+// Borders
+
+$border: 1px solid !default;
+$border-radius: 4px !default;
+$border-color: $grey-lt-100 !default;
+
+// Grid system
+
+$gutter-spacing: $sp-6 !default;
+$gutter-spacing-sm: $sp-4 !default;
+$nav-width: 16.5rem !default;
+$nav-width-md: 15.5rem !default;
+$nav-list-item-height: $sp-6 !default;
+$nav-list-item-height-sm: $sp-8 !default;
+$nav-list-expander-right: true;
+$content-width: 50rem !default;
+$header-height: 3.75rem !default;
+$search-results-width: $content-width - $nav-width !default;
+$transition-duration: 400ms;
+
+// Media queries in pixels
+
+$media-queries: (
+  xs: 20rem,
+  sm: 31.25rem,
+  md: $content-width,
+  lg: $content-width + $nav-width,
+  xl: 87.5rem,
+) !default;
diff --git a/docs/_sass/color_schemes/nhs.scss b/docs/_sass/color_schemes/nhs.scss
new file mode 100644
index 0000000..3ecdc4c
--- /dev/null
+++ b/docs/_sass/color_schemes/nhs.scss
@@ -0,0 +1,16 @@
+@import "./color_schemes/light";
+
+// Typography
+
+// prettier-ignore
+$body-font-family: "Frutiger W01", Arial, Sans-serif;
+$mono-font-family: "Frutiger W01", Arial, Sans-serif;
+
+
+
+$blue-000: #005eb8;
+$grey-dk-000: #d8dde0;
+$grey-dk-100: #f0f4f5;
+$sidebar-color: $grey-dk-000;
+$body-background-color: $grey-dk-100;
+$link-color: $blue-000;