Embedded HTML Google Maps - Heading Color?

My website is for our rental property business.  For each property page, I use Homestead's Website Builder maps which are perfect for a single property. 

However, for my home page, I embedded a google map I created that has all of our properties on it (over 50).  With the embedded google map I have more flexibility such as linking property photos to the markers, changing the colors and icons of markers, etc.  Anytime I update my google map, it automatically updates on my home page where it is embedded. 

I embedded the map onto my homepage in 2020.  At that time, I was able to change the background color of the heading of my embedded map that has our company name on it to match the same blue I use throughout our website.  Recently I copied that map to place on a different page on my website, however the heading of the copied map is black.  I've gone through every setting, but I can not figure out how to change the heading background color to the same color as my original map.  It's like the option giving me the ability to do that has disappeared or something.

Original Map - https://www.parkplacerealestate.net/

*The background color of the heading of the map is a grayish blue.

Copied Map - https://www.parkplacerealestate.net/apartments

*The background color of the heading of the map is a black.

Any idea on how I can fix the heading color of the embedded html map?  I don't want it to be black.  It's very harsh and ugly and does not fit in with the color scheme of my website.

Thanks,

Heather