diff --git a/ChangeLog.theme b/ChangeLog.theme
index 1c510af4..984a6cbb 100644
--- a/ChangeLog.theme
+++ b/ChangeLog.theme
@@ -1,7 +1,12 @@
 =================
-Terminology 1.7.0
+Terminology 1.8.0
 =================
 
+Changes since 1.7.0:
+--------------------
+  * Add group "terminology/color_preview", used to preview a color in a
+  tooltip.
+
 Changes since 1.6.0:
 --------------------
   * Add group "terminology/tab_drag_thumb", used to have a thumbnail of a
diff --git a/THEME.md b/THEME.md
index de2a8f25..034e3bb0 100644
--- a/THEME.md
+++ b/THEME.md
@@ -231,3 +231,9 @@ Title of the tab.
 ## Signal received
 ### `bell`
 To mark the tab as having missed a bell.
+
+
+
+# `terminology/color_preview`
+A group to preview a color in a tooltip. The color is defined by the color
+class `color_preview`.