Hi Brad
To change the font color in the first section
Go to the Appearance -> Theme Options -> Basic Settings -> Custom CSS
and use below css code in custom css box
.advfeaturedwrap, .advfeaturedwrap h3, .featureslists h5{ color:#000;}
.featureslists .fa{ color:#000; border:1px solid #000; }
Yo can change the color as per your need
To change the content of welcome section first create wecome page
Go to Appearance » Theme Options » Sections » Welcome to Website Section -> Select page
Please check documentation
https://www.gracethemes.com/documentation/pleasant-doc/#welcome
Regards
Grace Themes