tweak dark mode colours

web/_variables.sass

@@ -19,13 +19,13 @@ $warning-colour: #fd5
 
 // dark colours
 
-$night-black-colour: #aaa
-$night-dark-colour: #999
-$night-medium-colour: #777
-$night-light-colour: #333
-$night-white-colour: #222
+$night-black-colour: #e9e3d5
+$night-dark-colour: #a39b86
+$night-medium-colour: #9d907f
+$night-light-colour: #403f3d
+$night-white-colour: #212127
 
-$night-hilite-colour: #334
+$night-hilite-colour: #3c3221
 $night-link-colour: #39c
 $night-link-light-colour: #479
 $night-link-visited-colour: #87f
@@ -36,9 +36,6 @@ $night-warning-colour: #411
 // dark mode overrides
 
 body.dark
-  .nc
-    filter: hue-rotate(60deg) grayscale(25%)
-
   #stats #hours-now
     filter: none !important