diff --git a/modules/themes/siren-doom-themes.el b/modules/themes/siren-doom-themes.el
index 60feb8e..60afb9e 100644
--- a/modules/themes/siren-doom-themes.el
+++ b/modules/themes/siren-doom-themes.el
@@ -88,7 +88,28 @@
                           :background (doom-blend 'vc-deleted 'bg 0.2))
       (set-face-attribute 'diff-hl-change nil
                           :foreground (doom-blend 'vc-modified 'bg 0.7)
-                          :background (doom-blend 'vc-modified 'bg 0.2)))
+                          :background (doom-blend 'vc-modified 'bg 0.2))
+
+      (set-face-attribute 'siren-diff-hl-insert nil
+                          :foreground (doom-blend 'vc-added 'bg 0.6)
+                          :background (doom-color 'bg))
+      (set-face-attribute 'siren-diff-hl-delete nil
+                          :foreground (doom-blend 'vc-deleted 'bg 0.65)
+                          :background (doom-color 'bg))
+      (set-face-attribute 'siren-diff-hl-change nil
+                          :foreground (doom-blend 'vc-modified 'bg 0.5)
+                          :background (doom-color 'bg)))
+
+    (with-eval-after-load 'diff-hl-margin
+      (set-face-attribute 'diff-hl-margin-insert nil
+                          :foreground (doom-blend 'vc-added 'bg 0.6)
+                          :background (doom-blend 'vc-added 'bg 0.1))
+      (set-face-attribute 'diff-hl-margin-delete nil
+                          :foreground (doom-blend 'vc-deleted 'bg 0.7)
+                          :background (doom-blend 'vc-deleted 'bg 0.1))
+      (set-face-attribute 'diff-hl-margin-change nil
+                          :foreground (doom-blend 'vc-modified 'bg 0.5)
+                          :background (doom-blend 'vc-modified 'bg 0.1)))
 
     (with-eval-after-load 'diff-hl-margin
       (set-face-attribute 'diff-hl-margin-insert nil
diff --git a/modules/version-control/siren-diff-hl.el b/modules/version-control/siren-diff-hl.el
index 4f13969..6380d56 100644
--- a/modules/version-control/siren-diff-hl.el
+++ b/modules/version-control/siren-diff-hl.el
@@ -15,14 +15,59 @@
   (dired-mode . diff-hl-dired-mode)
   (magit-post-refresh . diff-hl-magit-post-refresh)
 
+  :custom
+  (diff-hl-fringe-bmp-function 'siren-diff-hl-fringe-bmp-line)
+  (diff-hl-fringe-face-function 'siren-diff-hl-fringe-face-from-type)
+  (diff-hl-margin-symbols-alist
+   '((insert . "+")
+     (delete . "-")
+     (change . "=")
+     (unknown . "?")
+     (ignored . "i")))
+
   :init
   (defun siren-turn-on-diff-hl-mode ()
     (turn-on-diff-hl-mode)
     (diff-hl-flydiff-mode 1))
 
+  (defgroup siren-diff-hl nil
+    "Siren specific tweaks to diff-hl.")
+
+  (defface siren-diff-hl-insert
+    '((default :inherit diff-hl-insert))
+    "Face used to highlight inserted lines."
+    :group 'siren-diff-hl)
+
+  (defface siren-diff-hl-delete
+    '((default :inherit diff-hl-delete))
+    "Face used to highlight deleted lines."
+    :group 'siren-diff-hl)
+
+  (defface siren-diff-hl-change
+    '((default :inherit diff-hl-change))
+    "Face used to highlight changed lines."
+    :group 'siren-diff-hl)
+
+  (defun siren-diff-hl-fringe-face-from-type (type _pos)
+    (intern (format "siren-diff-hl-%s" type)))
+
+  (defun siren-diff-hl-fringe-bmp-from-type(type _pos)
+    (intern (format "siren-diff-hl-%s" type)))
+
+  (defun siren-diff-hl-fringe-bmp-line(type _pos)
+    'siren-diff-hl-insert)
+
   :config
   (if (not (window-system))
-      (diff-hl-margin-mode 1)))
+      (diff-hl-margin-mode 1))
+
+  ;; Fringe bitmaps borrowed from doom-emacs' ui/vc-gutter module
+  (define-fringe-bitmap 'siren-diff-hl-insert
+    [224] nil nil '(center repeated))
+  (define-fringe-bitmap 'siren-diff-hl-change
+    [224] nil nil '(center repeated))
+  (define-fringe-bitmap 'siren-diff-hl-delete
+    [128 192 224 240] nil nil 'bottom))
 
 (provide 'siren-diff-hl)
 ;;; siren-diff-hl.el ends here