diff --git a/repo/theming/_mapColors.js b/repo/theming/_mapColors.js
index e79ebfa..9798198 100644
--- a/repo/theming/_mapColors.js
+++ b/repo/theming/_mapColors.js
@@ -500,8 +500,15 @@ function css() {
 
 // 'light' or 'dark'
 function vars(mode) {
-  // add the prefixes that light gray doesn't have first to preserve the same order
-  const sets = { text: '', highlight: '', callout: '' };
+  // order in which variables will appear
+  const sets = {
+    'text': '',
+    'highlight': '',
+    'callout': '',
+    // tag_default has the same color in light and dark
+    'tag': '--theme--tag_default: rgba(206, 205, 202, 0.5);\n--theme--tag_default-text: var(--theme--text);\n',
+    'board': ''
+  };
 
   // light gray separately
   for (let key in lightGray[mode]) {
diff --git a/repo/theming/theme.css b/repo/theming/theme.css
index f0cff9d..4473a89 100644
--- a/repo/theming/theme.css
+++ b/repo/theming/theme.css
@@ -724,6 +724,7 @@ body,
   border-color: var(--theme--text_secondary) !important;
 }
 
+/* make sure to change in _mapColors.js as well if colors ever change */
 .notion-body.dark [style*='background: rgb(80, 85, 88)']:not([role='button']),
 .notion-body.dark [style*='background-color: rgb(80, 85, 88)']:not([role='button']),
 .notion-body:not(.dark) [style*='background: rgba(206, 205, 202, 0.5)']:not([role='button']),
diff --git a/repo/theming/variables.css b/repo/theming/variables.css
index 965a7b9..8ff0aad 100644
--- a/repo/theming/variables.css
+++ b/repo/theming/variables.css
@@ -109,6 +109,8 @@
   --theme--callout_red: rgb(253, 235, 236);
   --theme--callout_red-text: currentColor;
 
+  --theme--tag_default: rgba(206, 205, 202, 0.5);
+  --theme--tag_default-text: var(--theme--text);
   --theme--tag_light_gray: rgba(227, 226, 224, 0.5);
   --theme--tag_light_gray-text: rgb(50, 48, 44);
   --theme--tag_gray: rgb(227, 226, 224);
@@ -295,6 +297,8 @@
   --theme--callout_red: rgb(94, 52, 54);
   --theme--callout_red-text: currentColor;
 
+  --theme--tag_default: rgba(206, 205, 202, 0.5);
+  --theme--tag_default-text: var(--theme--text);
   --theme--tag_light_gray: rgba(71, 76, 80, 0.7);
   --theme--tag_light_gray-text: rgba(255, 255, 255, 0.88);
   --theme--tag_gray: rgb(71, 76, 80);