Update

_sass/2017/components/h3-section.scss

@@ -79,10 +79,17 @@
 }
 
 .h3-section.-prime > .body {
-  border: solid 2px lighten($baseB-400, 50%);
+  border: solid 2px $baseB-600;
   border-radius: 2px;
   box-shadow:
     0 8px 12px rgba(80, 100, 150, 0.07),
     0 4px 8px rgba(80, 100, 150, 0.07),
     0 2px 3px rgba(80, 100, 150, 0.15);
+
+  & > pre ~ p,
+  & > ul ~ p,
+  & > iframe ~ p,
+  & > table ~ p {
+    border-top: solid 2px $baseB-600;
+  }
 }

_sass/2017/style.scss

@@ -10,6 +10,7 @@ $gray-text: #678;
 $text-color: #333;
 $baseA-400: #53a;
 $baseB-400: #35a;
+$baseB-600: adjust-color($baseB-400, $lightness: 20%, $hue: -20deg);
 $line-color: rgba(50, 80, 150, 0.1);
 $dark-line-color: rgba(50, 80, 150, 0.2);
 

sass.md

@@ -120,7 +120,7 @@ lightness($color)
 alpha($color)         /* aka opacity() */
 ```
 
-### Full adjustments
+### Adjustments
 
 ```scss
 /* Changes by fixed amounts */