diff --git a/editions/tw5.com/tiddlers/concepts/Colour Interpolation Hues.tid b/editions/tw5.com/tiddlers/concepts/Colour Interpolation Hues.tid
index aebedae0c..ae6604774 100644
--- a/editions/tw5.com/tiddlers/concepts/Colour Interpolation Hues.tid	
+++ b/editions/tw5.com/tiddlers/concepts/Colour Interpolation Hues.tid	
@@ -1,10 +1,10 @@
 created: 20260718221135000
-modified: 20260718221135000
+modified: 20260723130000000
 tags: Concepts
 title: Colour Interpolation Hues
 type: text/vnd.tiddlywiki
 
-Some [[colour spaces|Colour Spaces]] express colours using a hue angle on a circle running from 0 to 360 degrees. When interpolating between two colours in such a space, there are two ways around the circle, and the choice can produce drastically different results. The <<.def "hue adjuster">> controls which route is taken. It is used as the second suffix of the <<.olink colour-interpolate>> operator.
+<<.from-version "5.5.0">> Some [[colour spaces|Colour Spaces]] express colours using a hue angle on a circle running from 0 to 360 degrees. When interpolating between two colours in such a space, there are two ways around the circle, and the choice can produce drastically different results. The <<.def "hue adjuster">> controls which route is taken. It is used as the second suffix of the <<.olink colour-interpolate>> operator.
 
 |!Hue adjuster |!Route taken between the two hues |
 |shorter |The shorter arc around the hue circle. This is the default |
diff --git a/editions/tw5.com/tiddlers/concepts/Colour Spaces.tid b/editions/tw5.com/tiddlers/concepts/Colour Spaces.tid
index 0eebb2581..b3e7855f5 100644
--- a/editions/tw5.com/tiddlers/concepts/Colour Spaces.tid	
+++ b/editions/tw5.com/tiddlers/concepts/Colour Spaces.tid	
@@ -1,10 +1,10 @@
 created: 20260718221135000
-modified: 20260720103000000
+modified: 20260723130000000
 tags: Concepts
 title: Colour Spaces
 type: text/vnd.tiddlywiki
 
-The [[Colour Operators]] are backed by the [[color.js|https://colorjs.io/]] library, which supports the colour spaces below. See the [[color.js website|https://colorjs.io/docs/spaces]] for details of each space.
+<<.from-version "5.5.0">> The [[Colour Operators]] are backed by the [[color.js|https://colorjs.io/]] library, which supports the colour spaces below. See the [[color.js website|https://colorjs.io/docs/spaces]] for details of each space.
 
 * ''a98rgb-linear''
 * ''a98rgb''
diff --git a/editions/tw5.com/tiddlers/features/Palette Chooser.tid b/editions/tw5.com/tiddlers/features/Palette Chooser.tid
index 18eb63832..65696e842 100644
--- a/editions/tw5.com/tiddlers/features/Palette Chooser.tid	
+++ b/editions/tw5.com/tiddlers/features/Palette Chooser.tid	
@@ -1,5 +1,5 @@
 created: 20260718221135000
-modified: 20260722190000000
+modified: 20260723130000000
 tags: Features
 title: Palette Chooser
 type: text/vnd.tiddlywiki
@@ -12,9 +12,9 @@ To open the palette chooser:
 # Choose the <<.controlpanel-tab Appearance>> tab
 # Choose the ''Palette'' tab within it
 
-Each available palette is shown as a card with a preview of its colours. Click a card to switch to that palette. The change takes effect immediately.
+<<.from-version "5.5.0">> Each available palette is shown as a card with a preview of its colours. Click a card to switch to that palette. The change takes effect immediately.
 
-Beneath the chooser you may also see:
+<<.from-version "5.5.0">> Beneath the chooser you may also see:
 
 * Any failures reported by the current palette's [[readability tests|Palette Readability Tests]]
 * A customisations panel, if the current palette offers customisation options -- see [[Palette Customisations]]