If the contrast is not sufficient, you can adjust which values are used when you use m2-define-palette. The current implementation seems appropriate to say that it uses the color, and then its defined contrast color

@andrewseguin Thanks for checking the PR. However I believe changing the values in the palettes won't properly fix the underlying issue. The problem is that currently the foreground color of the header icon is set to the contrast color of the primary color. This is wrong, because the background of this icon is not the primary color but some other gray color.

So instead of making the color of the header icon depend on the primary contrast color, this value should instead be set to a value which gives better contrast to the gray background. Which is white for light theme and black for dark theme.

Also feel free to play around in the dev app, there the issue is visible in dark mode.

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