This only works with solid colors.
If you use a picture you looked two white lines on the menu
After add Class: ImmersiveStart::Menu
Important:
1.- Unknown > ImmersiveStart::Menu > PopUpBackground / FILLCOLOR (Any color)
2.- Unknown > ImmersiveStart::Menu > PopUpItem / BGTYPE= BORDERFILL
3.- Unknown > ImmersiveStart::Menu > PopUpItem / [add] Color:FILLCOLOR= (Favorite Color)
4.- Unknown > ImmersiveStart::Menu > PopUpItem / BORDERSIZE=-5
5.- Unknown > ImmersiveStart::Menu > PopUpItem > Hot [add] Int:BORDERSIZE=0
Optional
6.- Unknown > ImmersiveStart::Menu > PopUpItem > Hot [add] Color:FILLCOLOR= (Favorite Color)
7.- Unknown > ImmersiveStart::Menu > PopUpItem > Hot [add or change] Color:TEXTCOLOR= (Favorite Color)
Only if you want to change the border color
Fonts, Colors, & System Metrics > Fonts & System Metrics / FLATMENUS (unchecked)
PopUp Border
Blue Fonts, Colors, & System Metrics > Fonts & System Metrics LIGHT3D
Red Fonts, Colors, & System Metrics > Fonts & System Metrics BTNHIGHLIGHT
Green Fonts, Colors, & System Metrics > Fonts & System Metrics BTNFACE
Black Fonts, Colors, & System Metrics > Fonts & System Metrics BTNSHADOW
Aqua Fonts, Colors, & System Metrics > Fonts & System Metrics DKSHADOW3D
Background
Orange Unknown > ImmersiveStart::Menu > PopUpItem / FILLCOLOR
white Unknown > ImmersiveStart::Menu > PopUpItem > Hot / FILLCOLOR
TEXT
white Unknown > ImmersiveStart::Menu > PopUpItem / TEXCOLOR
Black Unknown > ImmersiveStart::Menu > PopUpItem > Hot / TEXCOLOR