[Theme Horse Support Team]

Hi @jake-3565,

We have related the ‘Site Tagline’ color with the ‘Content Color’ So to change to color of Site Tagline then please go to Appearance > Customize > Ambition Theme Options > Font Color and change the color of ‘Content’ to a Dark Black.

And you can change the Site tagline under Font Size > Content But If you only wan’t to change the Font Size of Site Tagline then please go to the Appearance > Customizer > Ambition Theme Options > Custom CSS and paste the below custom css code.

#site-description {
	font-size: 16px;
	line-height: normal;
}

You can set to any font size at the place of 16

Thanks