Hi @akeimi,
You can go to Appearance >> Customize >> Additional CSS and add following CSS to chagne text color of footer widgets.
#footer-widgets .textwidget p a {
color: #c746c9;
}
Social is the title of widget and other first 2 widgets do not have title. It is better to add margin above title and make it align with other widgets.
You go to Appearance >> Customize >> Additional CSS and add the following CSS below code you have added to change color.
#footer-widgets .widget_wpcom_social_media_icons_widget h2.widget-title {
margin-top: 40px;
}