Added custom background option but it's not working

Hi,

I have added a new background option to rich text, but it’s not working. I have added all the correct codes and I don’t know why it’s not working… By the way where can I fix the traslation issue? (last picture). I could of course just change the color of one of the already existing backgrounds in settings_data.json but that’s not an ideal fix as I still lose an option. Do I have to add something in theme.liquid?

EDIT: I have fixed the translation. Color is still not getting applied though.

Webshop: https://axiomunit.store

EDIT: I HAVE FIXED THE ISSUE!