diff --git a/src/calibre/gui2/tweak_book/diff/view.py b/src/calibre/gui2/tweak_book/diff/view.py
index 359b0f7fb8..a096568078 100644
--- a/src/calibre/gui2/tweak_book/diff/view.py
+++ b/src/calibre/gui2/tweak_book/diff/view.py
@@ -929,4 +929,3 @@ class DiffView(QWidget):  # {{{
             self.scrollbar.setValue(self.scrollbar.value() + d * amount)
 # }}}
 
-# TODO: Add diff colors for other color schemes
diff --git a/src/calibre/gui2/tweak_book/editor/themes.py b/src/calibre/gui2/tweak_book/editor/themes.py
index 7b7c0b6559..f3a9081164 100644
--- a/src/calibre/gui2/tweak_book/editor/themes.py
+++ b/src/calibre/gui2/tweak_book/editor/themes.py
@@ -61,6 +61,11 @@ SOLARIZED = \
 
     Error        us=wave uc={red}
     Tooltip      fg=black bg=ffffed
+
+    DiffDelete   bg={base02} fg={red}
+    DiffInsert   bg={base02} fg={green}
+    DiffReplace  bg={base02} fg={blue}
+    DiffReplaceReplace bg={base03}
     '''
 # }}}
 
@@ -97,6 +102,11 @@ THEMES = {
     Error        us=wave uc=red
     SpecialCharacter bg={cursor_loc}
 
+    DiffDelete   bg=341414 fg=642424
+    DiffInsert   bg=143414 fg=246424
+    DiffReplace  bg=141434 fg=242464
+    DiffReplaceReplace bg=002050
+
     '''.format(
         cursor_loc='323232',
         identifier='cae682',