OldDiffColors: handle recent DiscussionTools color changes

OldDiffColors.js

@@ -1,4 +1,6 @@
 // Changes diff colors from yellow for removal and purple for addition, back to yellow for removal and blue for addition.
+// Fixes diff "black dot" bug when interacting with some user scripts.
+// Changes DiscussionTools published comment color from teal to light blue.
 
 // Forked from code by https://en.wikipedia.org/wiki/User:Hgzh, CC BY-SA 4.0, https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)/Archive_213#Heads-up%3A_Diff_colour
 
@@ -25,4 +27,11 @@ a.mw-diff-movedpara-right {
 	 color: transparent;
 }
 
+.ext-discussiontools-init-targetcomment {
+	background-color: #eaf3ff;
+}
+.ext-discussiontools-init-publishedcomment {
+	background-color: #eaf3ff; /* not #d5fdf4 */
+}
+
 ` );