Under the Colors section of Global Styles, there are several options to pick from (Fig 1):

• Background Color: Change the background color for your email campaign. 
• Body Background Color: Change the background color of the body of the email campaign; this will appear as a layer on top of the background color. 
• Title Color: Changes the color of title text in your email campaign. 
• Text Color: Changes the color of regular text in your email campaign. 
• Link Color: Changes the color of hyperlinked text (text that takes you to a webpage when clicked) in your email campaign 

Fig 1

Clicking the button next to the color options brings up a pop-up window where you can adjust the color you want in a few different ways (Fig 2). 

Fig 2

The easiest way to pick a color is to drag the slider to select what color you want, then specify the hue of the color in the palette above. 

If you're more of a technical person, you can type in the hex value of the color you want. Alternatively, you can click the hex button and select RGBA values instead to specify which color you like  (Fig 3).

Fig 3

After selecting the color you want, click away from the color pop-up window. Your new color should now appear in the Color options! 

To learn more about the other sections within Global Options, read the corresponding article:  

•  Global Styles - General 
• Global Styles- Typography
• Global Styles - Spacing
• Global Styles - Mobile Alignment