The low contrast of that white text on a purple gradient makes the page quite hard to read. I think red is a colour to avoid - because it's associated with danger and is very dominant on that page. I think the usual convention for such slide indicators is to have a weak colour, or no colour for 'off' and a stronger indicator for on.

Moving the descriptive text (labels) so far from the setting makes this page very hard to process visually - you have to scan back and forth for each setting. The description and settings should be near to each other.

In the past when trying to indicate an unchangeable value, I've put a tiny padlock next to the item, which might be an idea here.