Lightbox caption color

Site URL: https://www.relativelygenealogy.com/blog/mom-dad-1950-census

Some of the images on this page launch a lightbox when clicked. I can't seem to get the captions to show up. They are there, but render black on the dark mode and white on the light mode.  Can you suggest how I can change the color so they show up?thanks!

Please add the following code to Design > Custom Css:
 

.sqs-lightbox-meta{

p.sqsrte-small {

color:white !important;

}

}

thanks!