Honoring the dark/light color scheme set on the device might be a requirement in some cases (I haven't seen a straight answer about it for the EAA) but it is a good accessibility practice.

Including a toggle in an app/site UI so users can choose to not use their device setting is an extra.

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bryanrasmussen 11 hours ago | parent [-]

I'll just note that the EAA is not the only accessibility law operating in the world.

Furthermore there might be accessibility use cases in which your site works better for some people in dark mode and better for other people in light mode, expecting that people will switch their device settings when they come on your site if you have this problem would not be nice.

	▲	extra88 6 hours ago \| parent [-]
		I'm most familiar with the U.S., where it's not a requirement. Europe is the only place where I've heard there might be a requirement to honor a device's color scheme, I think it's very unlikely it exists anywhere else. If a site honors the dark/light setting, I don't know what accessibility need would be served by being in the opposite mode for that one site. Having a toggle to meet preferences, yes, need, I don't know.