How can I fix the banner text color in my code?

I may have messed up the banner text color, whenever I implement code to change the banner color nothing works, I think something is messed up, in the code for the image banner, I would like it to be a dark blue. If someone can help it would be so nice, I have tried everything so at this point it is almost safe to assume the code has an error I can not identify properly somewhere!

I also would like to have a transparent text box around the text on mobile and desktop!

@AndrewBorger

Sorry you are facing this issue, it would be my pleasure to help you.

Welcome to the Shopify community! :blush:
Thanks for your good question.

Please share your site URL,
I will check out the issue and provide you a solution here.

HTTPS://deepdiveswimschool.com

It only works when the text box is displayed.