From Header Design & Colors tab you can change colors, font size and hover design.
These are settings from this area:
Header and Sticky Header Height
These options apply for header type 1 and 2.
Top Menu and Menu Item Font Size
Border Bottom Header, Sticky Header Height and color
Top Bar Background Color and Font Color (Header Widget Menu)
Help for header widgets setup: http://help.wpresidence.net/article/widgets-2/#a_wpestate_id
Top Menu & Sticky Menu Background Color
Top menu, sticky menu, hover menu and active menu font color
Top Menu Hover Options
From the same settings you control hover design style (you have 6 different styles to select from)
For Hover Type 1, 2, 5, 6 – setup color for Top Menu Hover Font Color option
For Hover Type 3, 4 – setup color for Top Menu Hover Background Color option