diff --git a/.github/workflows/pa11y.yaml b/.github/workflows/pa11y.yaml
index 09b0bdd4..a6063897 100644
--- a/.github/workflows/pa11y.yaml
+++ b/.github/workflows/pa11y.yaml
@@ -40,4 +40,4 @@ jobs:
       - name: Serve site and test with pa11y
         run: |
           bundle exec jekyll serve --detach
-          pa11y-ci http://localhost:4000/
+          pa11y-ci --sitemap http://localhost:4000/sitemap.xml
diff --git a/Gemfile b/Gemfile
index d51c8548..83df932d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -37,3 +37,6 @@ gem "jekyll-redirect-from"
 gem "jemoji"
 
 gem "webrick", "~> 1.7"
+
+# Generates a sitemap
+gem 'jekyll-sitemap'
\ No newline at end of file
diff --git a/_config.yml b/_config.yml
index 249a8a6a..5af776cf 100644
--- a/_config.yml
+++ b/_config.yml
@@ -53,6 +53,7 @@ plugins:
   - jekyll-redirect-from
   - jekyll-paginate
   - jemoji
+  - jekyll-sitemap
 exclude:
   - Gemfile
   - Gemfile.lock
diff --git a/_layouts/default.html b/_layouts/default.html
index 6fb2ea89..71044f40 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -60,13 +60,9 @@
     <div class="container">
         <h1 class="logo float-left">
             <span class="logo-title">
-                <a href="https://www.sheffield.ac.uk">
-                    <img src="/assets/images/logo/TUOS_PRIMARY_LOGO_FULL_COLOUR.png" width="110"
-                        alt="The University of Sheffield" />
-                </a>
                 <a href="/">
-                    <img src="/assets/images/logo/rse-logoonly-stroke-small.png" width="45"
-                        alt="Research Software Engineering Sheffield" />
+                    <img src="/assets/images/logo/UoS_Violet_RSE.png" width="250"
+                        alt="The University of Sheffield Research Software Engineering" />
                 </a>
             </span>
         </h1><!--//logo-->
@@ -100,7 +96,8 @@ <h1 class="logo float-left">
          <a href="http://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
             target="_blank"
             rel="license noopener noreferrer"
-            style="display:inline-block;">
+            style="display:inline-block;"
+            class="sm-a">
          CC BY-SA 4.0
          <img
            style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
@@ -114,7 +111,7 @@ <h1 class="logo float-left">
     </div><!--//container-->
     <div class="container text-center">
         <!--/* This template is released under the Creative Commons Attribution 3.0 License. Please keep the attribution link below when using for your own project. Thank you for your support. :) If you'd like to use the template without the attribution, you can buy the commercial license via our website: themes.3rdwavemedia.com */-->
-        <small class="copyright">Designed with <i class="fas fa-heart"></i> by <a href="https://themes.3rdwavemedia.com" target="_blank">Xiaoying Riley</a> for developers</small>
+        <small class="copyright">Designed with <i class="fas fa-heart"></i> by <a href="https://themes.3rdwavemedia.com" target="_blank" class="sm-a">Xiaoying Riley</a> for developers</small>
     </div><!--//container-->
 </footer><!--//footer-->
 
diff --git a/_sass/theme/_base.scss b/_sass/theme/_base.scss
index 60e479f3..591b24c2 100644
--- a/_sass/theme/_base.scss
+++ b/_sass/theme/_base.scss
@@ -1,15 +1,28 @@
 /* ======= Base ======= */
+
 @font-face {
-    font-family: 'tuos_stephensonbold';
-    src: url('/assets/fonts/stephbd-webfont.woff2') format('woff2'),
-    url('/assets/fonts/stephbd-webfont.woff') format('woff');
+    font-family: uos-sans;
+    src: url('../fonts/SourceSansPro-Regular.ttf') format("truetype");
     font-weight: normal;
     font-style: normal;
+  }
 
-}
+@font-face {
+    font-family: uos-serif;
+    src: url('../fonts/SourceSerifPro-Regular.ttf') format("truetype");
+    font-weight: normal;
+    font-style: normal;
+  }
+
+@font-face {
+    font-family: uos-mono;
+    src: url('../fonts/SourceCodePro-VariableFont_wght.ttf') format("truetype");
+    font-weight: normal;
+    font-style: monospace;
+  }
 
 body {
-    font-family: 'Lato', arial, sans-serif;   
+    font-family: 'uos-sans', arial, sans-serif;   
     color: $text-color;
     font-size: 16px;
     -webkit-font-smoothing: antialiased;
diff --git a/assets/css/custom.css b/assets/css/custom.css
index f8c80dee..f5d27802 100644
--- a/assets/css/custom.css
+++ b/assets/css/custom.css
@@ -12,12 +12,25 @@
     xl @media (min-width:1200px)
 */
 
+:root {
+    --uos-deep-violet: #440099;
+    --uos-powder-blue: #9ADBE8;
+    --uos-midnight-black: #131E29;
+    --uos-teal: #005A8F;
+    --uos-aqua: #00BBCC;
+    --uos-mint-green: #00CE7C;
+  }
+
+.header{
+    background-color: #fff;
+}
+
 .promo{
-    background: #37618a;
+    background: var(--uos-midnight-black);
 }
 
 .footer{
-    background: #00060c;
+    background: var(--uos-midnight-black);
 }
 
 /* Sizes for h1 to h6, overriding bootstrap css */
@@ -28,12 +41,29 @@ h4, .h4 { font-size: 1.5rem; }
 h5, .h5 { font-size: 1.25rem; }
 h6, .h6 { font-size: 1rem; }
 
+h1, h2, h3, h4, h5, h6  {
+    color: var(--uos-deep-violet);
+}
+
+a {
+    color: var(--uos-deep-violet);
+}
+
 .nav-link{
-    color: #00060d !important;
+    color: var(--uos-midnight-black) !important;
+}
+
+.contact {
+    background: var(--uos-midnight-black);
 }
 
 .contact-inner a {
-    color: #00060d !important;
+    color: var(--uos-powder-blue);
+    text-decoration: underline;
+}
+
+.contact-inner h2 {
+    color: #fff !important;
 }
 
 .seminar-section {
@@ -115,7 +145,7 @@ div.all-posts {
 
 /* Extra custom styling for pre / code blocks */
 pre {
-    background-color: #282a36;
+    background-color: var(--uos-midnight-black);
     padding: 1em;
     margin: 0 0 1em 0;
     border-radius: 0.4em;
@@ -153,8 +183,33 @@ blockquote {
     white-space: normal;
 }
 
+.btn-primary {
+    background-color: var(--uos-powder-blue);
+    border-color: var(--uos-powder-blue);
+    color: var(--uos-midnight-black);
+}
+
+.btn-primary:hover {
+    background-color: var(--uos-deep-violet);
+    border-color: var(--uos-deep-violet);
+    color: var(#fff);
+}
+
+.btn-success {
+    background-color: var(--uos-mint-green);
+    border-color: var(--uos-mint-green);
+    color: var(--uos-midnight-black);
+}
+
+.btn-success:hover {
+    background-color: var(--uos-deep-violet);
+    border-color: var(--uos-deep-violet);
+    color: var(#fff);
+}
+
 .sm-a {
-    color: #b0ea44;
+    color: var(--uos-powder-blue);
+    text-decoration: underline;
 }
 
 .sm-a:hover{
diff --git a/assets/fonts/SourceCodePro-VariableFont_wght.ttf b/assets/fonts/SourceCodePro-VariableFont_wght.ttf
new file mode 100644
index 00000000..cd96a614
Binary files /dev/null and b/assets/fonts/SourceCodePro-VariableFont_wght.ttf differ
diff --git a/assets/fonts/SourceSansPro-Regular.ttf b/assets/fonts/SourceSansPro-Regular.ttf
new file mode 100644
index 00000000..98e85797
Binary files /dev/null and b/assets/fonts/SourceSansPro-Regular.ttf differ
diff --git a/assets/fonts/SourceSerifPro-Regular.ttf b/assets/fonts/SourceSerifPro-Regular.ttf
new file mode 100644
index 00000000..5c593b99
Binary files /dev/null and b/assets/fonts/SourceSerifPro-Regular.ttf differ
diff --git a/assets/fonts/StephIt.ttf b/assets/fonts/StephIt.ttf
deleted file mode 100644
index 028e9147..00000000
Binary files a/assets/fonts/StephIt.ttf and /dev/null differ
diff --git a/assets/fonts/stephbd-webfont.woff b/assets/fonts/stephbd-webfont.woff
deleted file mode 100644
index c1928f3f..00000000
Binary files a/assets/fonts/stephbd-webfont.woff and /dev/null differ
diff --git a/assets/fonts/stephbd-webfont.woff2 b/assets/fonts/stephbd-webfont.woff2
deleted file mode 100644
index a2f32e5c..00000000
Binary files a/assets/fonts/stephbd-webfont.woff2 and /dev/null differ
diff --git a/assets/images/logo/UoS_Violet_RSE.png b/assets/images/logo/UoS_Violet_RSE.png
new file mode 100644
index 00000000..7740db4e
Binary files /dev/null and b/assets/images/logo/UoS_Violet_RSE.png differ