diff --git a/themes/neon-noir.sass b/themes/neon-noir.sass
index d4004f8..8f8aa27 100644
--- a/themes/neon-noir.sass
+++ b/themes/neon-noir.sass
@@ -11,9 +11,12 @@ $list-padding-left: 1.5em
 $primary-color: #d10094    // Primary (Pink): Vibrant and attention-grabbing.
 $secondary-color: #5b8ee8  // Secondary (Blue): Rich, calming contrast to pink.
 $tertiary-color: #228b22   // Tertiary (Green): Strong, natural balance to pink and blue.
-$quaternary-color: #40e0d0 // Quaternary (Turquoise): Fresh and energetic, great for highlights or links.
+$quaternary-color: #ab9b6c
 $quinary-color: #ffd966    // Quinary (Mustard Yellow): Warm and muted, adds subtle emphasis for accents.
 
+// original
+// $quaternary-color: #40e0d0 // Quaternary (Turquoise): Fresh and energetic, great for highlights or links.
+
 $code-background-color: #1e1f29 // Very dark blue for code blocks
 $code-text-color: #f8f8f2 // Off-white for code text
 
@@ -30,13 +33,16 @@ $anchor-hover-color: color.adjust($primary-color, $lightness: 15%)
 $toc-anchor-color: color.adjust($secondary-color, $lightness: -5%)
 $toc-anchor-hover-color: color.adjust($primary-color, $lightness: -5%)
 
+$contents-overview-anchor-color: $quaternary-color
+$contents-overview-anchor-hover-color: color.adjust($contents-overview-anchor-color, $lightness: 20%)
+
 // Tables
 $table-header-bg: #44475a // Steely blue for table headers
 $table-border-color: #6272a4 // Muted blue-gray for borders
 
 $default-header-sizes: ()
-$default-header-sizes: map.set($default-header-sizes, h1, 2.5em)
-$default-header-sizes: map.set($default-header-sizes, h2, 2em)
+$default-header-sizes: map.set($default-header-sizes, h1, 2em)
+$default-header-sizes: map.set($default-header-sizes, h2, 1.7em)
 $default-header-sizes: map.set($default-header-sizes, h3, 1.5em)
 $default-header-sizes: map.set($default-header-sizes, h4, 1.2em)
 $default-header-sizes: map.set($default-header-sizes, h5, 1.2em)
@@ -46,7 +52,7 @@ $default-header-colors: ()
 $default-header-colors: map.set($default-header-colors, h1, $primary-color)
 $default-header-colors: map.set($default-header-colors, h2, $secondary-color)
 $default-header-colors: map.set($default-header-colors, h3, $secondary-color)
-$default-header-colors: map.set($default-header-colors, h4, $secondary-color)
+$default-header-colors: map.set($default-header-colors, h4, $quaternary-color)
 
 
 // Initialize empty maps