diff --git a/core/palette-templates/TwentyTwenties.tid b/core/palette-templates/TwentyTwenties.tid
index 311af62c4..a9ddf3bd0 100644
--- a/core/palette-templates/TwentyTwenties.tid
+++ b/core/palette-templates/TwentyTwenties.tid
@@ -72,13 +72,13 @@ diff-invisible-background:
 diff-invisible-foreground: [function[colour],[muted-foreground]]
 dirty-indicator: [function[colour],[base-tertiary]]
 download-background: [tf.interpolate-colours[base-paper],[base-green],[0.6]]
-download-foreground: [tf.interpolate-colours[base-ink],[base-green],[1]]
+download-foreground: [tf.interpolate-colours[base-ink],[base-green],[0.1]]
 dragger-background: [function[colour],[foreground]]
 dragger-foreground: [function[colour],[background]]
 dropdown-background: [function[colour],[background]]
 dropdown-border: [function[colour],[muted-foreground]]
-dropdown-tab-background-selected: [function[colour],[]]
-dropdown-tab-background: [function[colour],[]]
+dropdown-tab-background-selected: [function[colour],[background]]
+dropdown-tab-background: [tf.interpolate-colours[base-paper],[base-ink],[0.9]]
 dropzone-background: rgba(0,200,0,0.7)
 external-link-background-hover: inherit
 external-link-background-visited: inherit
@@ -86,21 +86,21 @@ external-link-background: inherit
 external-link-foreground-hover: inherit
 external-link-foreground-visited: [function[colour],[primary]]
 external-link-foreground: [function[colour],[primary]]
-footnote-target-background: [function[colour],[]]
+footnote-target-background: [tf.interpolate-colours[base-paper],[base-ink],[0.2]]
 foreground: [function[colour],[base-ink]]
 ?background-foreground-contrast: [tf.check-colour-contrast[background],[foreground],[45]]
-highlight-background: [function[colour],[]]
-highlight-foreground: [function[colour],[]]
-message-background: [function[colour],[]]
-message-border: [function[colour],[]]
-message-foreground: [function[colour],[]]
+highlight-background: [tf.interpolate-colours[base-paper],[base-yellow],[0.5]]
+highlight-foreground: [tf.interpolate-colours[base-yellow],[base-ink],[0.8]]
+message-background: [tf.interpolate-colours[base-paper],[base-blue],[0.2]]
+message-border: [tf.interpolate-colours[base-blue],[base-ink],[0.5]]
+message-foreground: [tf.interpolate-colours[base-blue],[base-ink],[0.8]]
 modal-backdrop: [function[colour],[foreground]]
 modal-background: [function[colour],[background]]
 modal-border: [function[colour],[]]
 modal-footer-background: [function[colour],[]]
 modal-footer-border: [function[colour],[]]
 modal-header-border: [function[colour],[]]
-muted-foreground: [function[colour],[]]
+muted-foreground: [tf.interpolate-colours[base-paper],[base-ink],[0.5]]
 network-activity-foreground: [function[colour],[]]
 notification-background: [function[colour],[base-tertiary]colour-set-oklch:l[0.9]]
 notification-border: [function[colour],[base-tertiary]colour-set-oklch:l[0.2]]
@@ -116,7 +116,7 @@ sidebar-button-foreground: [function[colour],[foreground]]
 sidebar-controls-foreground-hover: [function[colour],[]]
 sidebar-controls-foreground: [function[colour],[]]
 sidebar-foreground-shadow: rgba(255,255,255, 0.8)
-sidebar-foreground: [function[colour],[]]
+sidebar-foreground: =[function[colour],[base-ink]] =[function[colour],[base-paper]] =[function[colour],[base-background]] +[colour-best-contrast:DeltaPhi[]]
 sidebar-muted-foreground-hover: [function[colour],[]]
 sidebar-muted-foreground: [function[colour],[]]
 sidebar-tab-background-selected: [function[colour],[]]
@@ -134,26 +134,26 @@ stability-experimental: [function[colour],[]]
 stability-deprecated: [function[colour],[]]
 stability-legacy: [function[colour],[]]
 static-alert-foreground: [function[colour],[]]
-tab-background-selected: [function[colour],[]]
-tab-background: [function[colour],[]]
-tab-border-selected: [function[colour],[]]
-tab-border: [function[colour],[]]
-tab-divider: [function[colour],[]]
+tab-background-selected: [function[colour],[background]]
+tab-background: [tf.interpolate-colours[base-paper],[base-ink],[0.2]]
+tab-border-selected: [function[colour],[muted-foreground]]
+tab-border: [function[colour],[muted-foreground]]
+tab-divider: [function[colour],[muted-foreground]]
 tab-foreground-selected: [function[colour],[tab-foreground]]
-tab-foreground: [function[colour],[]]
+tab-foreground: [function[colour],[foreground]]
 table-border: [function[colour],[]]
 table-footer-background: [function[colour],[]]
 table-header-background: [function[colour],[]]
-tag-background: [function[colour],[]]
-tag-foreground: [function[colour],[]]
+tag-background: [tf.interpolate-colours[base-paper],[base-yellow],[0.9]]
+tag-foreground: [tf.interpolate-colours[base-yellow],[base-ink],[0.8]]
 testcase-accent-level-1: [function[colour],[]]
 testcase-accent-level-2: [function[colour],[]]
 testcase-accent-level-3: [function[colour],[]]
 tiddler-background: [function[colour],[background]]
-tiddler-border: [tf.interpolate-colours,[base-paper],[base-background],[0.5]]
-tiddler-controls-foreground-hover: [tf.interpolate-colours,[background],[foreground],[0.7]]
-tiddler-controls-foreground-selected: [tf.interpolate-colours,[background],[foreground],[0.9]]
-tiddler-controls-foreground: [tf.interpolate-colours,[background],[foreground],[0.5]]
+tiddler-border: [tf.interpolate-colours[base-paper],[base-background],[0.5]]
+tiddler-controls-foreground-hover: [tf.interpolate-colours[background],[foreground],[0.7]]
+tiddler-controls-foreground-selected: [tf.interpolate-colours[background],[foreground],[0.9]]
+tiddler-controls-foreground: [tf.interpolate-colours[background],[foreground],[0.5]]
 tiddler-editor-background: [function[colour],[]]
 tiddler-editor-border-image: [function[colour],[]]
 tiddler-editor-border: [function[colour],[]]