How to enable such a check for all users and make it default?
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I think the easiest way would be to just make your dark colour pallette the only available one, and then that would be your site colours.
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But the aim is to match the user’s color-scheme mode of his device, so the light mode is needed too.
What are the possible ways to achieve that, API etc. ?
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Ah, in that case would the default dark mode color scheme id be what you’re looking for?
Automatic Dark Mode color scheme switching
(The 'Enable automatic dark mode colour scheme` is default enabled, as long as there are no other colour palettes available to be ‘selected by user’)
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