diff --git a/umap/static/umap/content.css b/umap/static/umap/content.css
index bade8061..6ad7cb07 100644
--- a/umap/static/umap/content.css
+++ b/umap/static/umap/content.css
@@ -149,12 +149,12 @@ h2.section {
 }
 h2.tabs {
     text-transform: uppercase;
-    color: #263B58;
+    color: var(--color-darkBlue);
     text-align: left;
     padding-top: 28px;
 }
 h2.tabs a {
-    color: #263B58;
+    color: var(--color-darkBlue);
     text-decoration: underline;
     text-decoration-thickness: 3px;
     text-decoration-skip-ink: none;
@@ -162,7 +162,7 @@ h2.tabs a {
 }
 h2.tabs a:not(.selected) {
     font-weight: normal;
-    color: #263B58;
+    color: var(--color-darkBlue);
     text-decoration: none;
     margin-right: 0;
 }
@@ -203,8 +203,8 @@ body.content #umap-ui-container {
 
 input[type="submit"],
 .button {
-    background-color: #B9F5D2;
-    color: #263B58;
+    background-color: var(--color-waterMint);
+    color: var(--color-darkBlue);
 }
 .button-primary {
     font-weight: bold;
@@ -213,8 +213,8 @@ input[type="submit"],
     background-color: #35537c;
 }
 .wrapper .neutral, .wrapper input[type="submit"].neutral {
-    background-color: #ddd;
-    color: #323737;
+    background-color: var(--color-lightGray);
+    color: var(--color-darkGray);
 }
 .wrapper.somber {
     background-color: #2E3641;
@@ -397,7 +397,7 @@ ul.umap-autocomplete {
     }
 }
 .table-header form input {
-    border: 2px solid #263B58;
+    border: 2px solid var(--color-darkBlue);
     border-radius: 0;
     padding: .5rem 1rem;
     margin-bottom: 0;
@@ -408,7 +408,7 @@ ul.umap-autocomplete {
     width: 30ch;
 }
 .table-header form input[type="submit"] {
-    background-color: #263B58;
+    background-color: var(--color-darkBlue);
     color: white;
     font-weight: bold;
 }
@@ -417,8 +417,8 @@ ul.umap-autocomplete {
     width: inherit;
     display: inline;
     padding: .5rem 1rem;
-    border: 2px solid #263B58;
-    color: #263B58;
+    border: 2px solid var(--color-darkBlue);
+    color: var(--color-darkBlue);
     font-weight: bold;
     background-color: initial;
     margin-bottom: 0;
@@ -440,7 +440,7 @@ ul.umap-autocomplete {
 }
 .table-wrapper table a,
 .table-wrapper table thead {
-    color: #263B58;
+    color: var(--color-darkBlue);
 }
 .table-wrapper table thead th:last-of-type {
     min-width: 240px;
@@ -460,7 +460,7 @@ ul.umap-autocomplete {
 .table-wrapper table input[type="submit"] {
     display: inline;
     background-color: transparent;
-    color: #263B58;
+    color: var(--color-darkBlue);
     padding: 0;
     width: inherit;
     height: 1rem;
@@ -520,7 +520,7 @@ dialog::backdrop {
     padding: 1rem;
 }
 .pagination a {
-    color: #263B58;
+    color: var(--color-darkBlue);
     text-decoration: underline;
 }
 
diff --git a/umap/static/umap/test/index.html b/umap/static/umap/test/index.html
index 23c9d52f..86364301 100644
--- a/umap/static/umap/test/index.html
+++ b/umap/static/umap/test/index.html
@@ -62,6 +62,7 @@
     <link rel="stylesheet" href="../vendors/locatecontrol/L.Control.Locate.min.css" />
     <link rel="stylesheet" href="../vendors/iconlayers/iconLayers.css" />
 
+    <link rel="stylesheet" href="../../umap/vars.css" />
     <link rel="stylesheet" href="../../umap/font.css" />
     <link rel="stylesheet" href="../../umap/base.css" />
     <link rel="stylesheet" href="../../umap/content.css" />
diff --git a/umap/static/umap/vars.css b/umap/static/umap/vars.css
new file mode 100644
index 00000000..a4b4e783
--- /dev/null
+++ b/umap/static/umap/vars.css
@@ -0,0 +1,9 @@
+:root {
+    /* In use for primary buttons. */
+    --color-darkBlue: #263B58;
+    --color-waterMint: #B9F5D2;
+
+    /* In use for secondary buttons. */
+    --color-lightGray: #ddd;
+    --color-darkGray: #323737;
+}
diff --git a/umap/templates/umap/css.html b/umap/templates/umap/css.html
index 186b1dfa..3ba178c9 100644
--- a/umap/templates/umap/css.html
+++ b/umap/templates/umap/css.html
@@ -22,6 +22,7 @@
       href="{% static 'umap/vendors/locatecontrol/L.Control.Locate.min.css' %}" />
 <link rel="stylesheet"
       href="{% static 'umap/vendors/iconlayers/iconLayers.css' %}" />
+<link rel="stylesheet" href="{% static 'umap/vars.css' %}" />
 <link rel="stylesheet" href="{% static 'umap/font.css' %}" />
 <link rel="stylesheet" href="{% static 'umap/base.css' %}" />
 <link rel="stylesheet" href="{% static 'umap/content.css' %}" />