I added an actual change in colour when you have visited a link, sinc…

…e it might be bad practice not to

docs/css/css_options.css

@@ -1,18 +1,18 @@
 /* Changing the ugly purple visited colour to remain blue or white for all links */
-/* Cross references remain blue */
+/* Cross references turns grayblue */
 a[class="reference internal"]:visited {
-    color: #6d91a8;
+    color: #6a8392;
 }
 a[class="reference external"]:visited {
-    color: #2980B9;
+    color: #6a8392;
 }
 
 /* Toctree remains white */
 div[class="wy-side-scroll"] li[class='toctree-l1'] a:visited {
     color: white;
 }
 
-/* Home icon remains blue */
+/* Home icon turns grayblue */
 ul[class="wy-breadcrumbs"] a:visited {
-    color: #2980B9;
+    color: #6a8392;
 }