diff --git a/theme-github-dark.css b/theme-github-dark.css
index 122eebb..4b093a9 100644
--- a/theme-github-dark.css
+++ b/theme-github-dark.css
@@ -499,3 +499,19 @@ a.blob-excerpt {
   background-color: var(--color-navbar);
   color: var(--color-text);
 }
+
+/* PR timelines colors */
+.repository.view.issue .comment-list .timeline-item .badge .svg {
+  fill: black;
+}
+.repository.view.issue .comment-list .timeline-item .badge {
+  background-color: var(--color-text);
+  color: var(--color-text);
+}
+.repository.view.issue .comment-list .timeline-item .badge.badge-commit {
+  border-color: var(--color-text);
+  background: var(--color-text);
+}
+.repository.view.issue .comment-list .timeline:before {
+  background-color: var(--color-text);
+}