How to Change the Color of Text Overlaying an Image
To change the color of a text overlaying images in sections which combine text and image, navigate to Site Builder and click Customize.
From the Content section’s left column go to the page where you want to change the section’s text color.
Click on the text which you wish to style.
Now go to the left column and look for Section Color.
From there, you can change the color of the text by selecting different options using any of the predefined color combinations.