diff --git a/editor/editor_themes.cpp b/editor/editor_themes.cpp
index 6d9a5c161f8..261b4a44dda 100644
--- a/editor/editor_themes.cpp
+++ b/editor/editor_themes.cpp
@@ -1056,7 +1056,7 @@ Ref<Theme> create_editor_theme(const Ref<Theme> p_theme) {
 	const Color string_color = Color::html(dark_theme ? "#ffd942" : "#ffd118").linear_interpolate(mono_color, dark_theme ? 0.5 : 0.3);
 
 	const Color te_background_color = dark_theme ? background_color : base_color;
-	const Color completion_background_color = base_color;
+	const Color completion_background_color = dark_theme ? base_color : background_color;
 	const Color completion_selected_color = alpha1;
 	const Color completion_existing_color = alpha2;
 	const Color completion_scroll_color = alpha1;
@@ -1069,7 +1069,7 @@ Ref<Theme> create_editor_theme(const Ref<Theme> p_theme) {
 	const Color selection_color = alpha2;
 	const Color brace_mismatch_color = error_color;
 	const Color current_line_color = alpha1;
-	const Color line_length_guideline_color = warning_color;
+	const Color line_length_guideline_color = dark_theme ? base_color : background_color;
 	const Color word_highlighted_color = alpha1;
 	const Color number_color = basetype_color.linear_interpolate(mono_color, dark_theme ? 0.5 : 0.3);
 	const Color function_color = main_color;