After upgrading to Tailwind 3.4.1, colors overridden by dark: are getting flipped

We have markup such as `class="bg-zinc-200 dark:bg-zinc-800 "`. This worked fine with Tailwind 3.1.8, but after upgrading to Tailwind 3.4.1, `bg-zinc-800` is displaying as a light background, presumably getting flipped to `bg-zinc-100`.