How to change Menu(wedgets) separator's color

What LVGL version are you using?

V8.2

What do you want to achieve?

Change the separator’s color(green area)
image

In my project,I use dark theme
Origin separator(light gray color) is hard to recognisable
I want to change the color
image

What have you tried so far?

I get the menu item,that’s it.

lv_obj_t *menu = lv_menu_create(lv_scr_act());