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)

top-bar

 

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

Transparent Header Color and Hover Color

Menu Item Color

menu-item

Menu Item Back Color

background

Menu Item Hover Back Color

hover-back

Menu Item hover font color

hvoer-font

Menu border color