Thanks for the clarification. That may be the case, but I’m afraid it’s still not at all obvious, especially when the “on” color is one that ordinarily indicates danger. iOS, for instance, does use left=off, right=on, but also displays “on” toggles in green.
Travis-CI.org also uses green, but goes one step further by including a checkbox for “on” and an X for “off”, making it clear even to the most colorblind user:
The inactive states in both iOS and Travis are also much lower contrast than the active states (also a helpful distinction for users with impaired color vision). Possibly if I’d launched Brave in light mode I would have been less confused, but in dark mode the gray toggles are quite high-contrast.