Yep, I can help you get this adjusted in your CSS. What color did you want it to be?
If you wanted your Title/Text to be Black (as an example), take a look in your style.css file around line 1223 and you can change the color like this –
.front-page .site-header .site-title a,
.front-page .site-header .site-title a:hover {
color: #000;
}
That will cover the title as it shows up on top of the background image for the homepage.
On your other pages there is already a black background with white text, so you’ll only need to adjust the code above for the Home page.
You can also add a logo/image if you wanted to as well. This can be done through the Customizer page in your Admin.
Let me know if this helps.