diff --git a/builtin/log.c b/builtin/log.c
index d760ee0885763e964afd9cdaf09a0986da606804..f5d49305903911eb7aa0fb3f73e0fd950b896228 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -608,7 +608,8 @@ static int git_format_config(const char *var, const char *value, void *cb)
 		string_list_append(&extra_cc, value);
 		return 0;
 	}
-	if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {
+	if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff") ||
+	    !strcmp(var, "color.ui")) {
 		return 0;
 	}
 	if (!strcmp(var, "format.numbered")) {
diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 5cbc066e68e15b1015d9b8838b44a8042d4f04fd..7e405d7af667e8406fdbcd57eb2b9f077627fad0 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -886,4 +886,12 @@ test_expect_success 'empty subject prefix does not have extra space' '
 	test_cmp expect actual
 '
 
+test_expect_success 'format patch ignores color.ui' '
+	test_unconfig color.ui &&
+	git format-patch --stdout -1 >expect &&
+	test_config color.ui always &&
+	git format-patch --stdout -1 >actual &&
+	test_cmp expect actual
+'
+
 test_done