diff --git a/editor/themes/theme_modern.cpp b/editor/themes/theme_modern.cpp
index 20a9f8c8a2..64d6e292b4 100644
--- a/editor/themes/theme_modern.cpp
+++ b/editor/themes/theme_modern.cpp
@@ -220,8 +220,8 @@ void ThemeModern::populate_shared_styles(const Ref<EditorTheme> &p_theme, Editor
 
 		// Additional editor colors.
 
-		p_theme->set_color("box_selection_fill_color", EditorStringName(Editor), p_config.mono_color * Color(1, 1, 1, 0.12));
-		p_theme->set_color("box_selection_stroke_color", EditorStringName(Editor), p_config.mono_color * Color(1, 1, 1, 0.4));
+		p_theme->set_color("box_selection_fill_color", EditorStringName(Editor), Color(0.65, 0.65, 0.65, 0.15));
+		p_theme->set_color("box_selection_stroke_color", EditorStringName(Editor), Color(0.55, 0.55, 0.55, 0.55));
 
 		p_theme->set_color("axis_x_color", EditorStringName(Editor), Color(0.96, 0.20, 0.32));
 		p_theme->set_color("axis_y_color", EditorStringName(Editor), Color(0.53, 0.84, 0.01));