@femuruy you think the contrast in the header isn't high enough? Or do you feel like it's too bright?
The orange on white is slightly lower contrast, and I'm still adjusting things, but on my screens it's not that jarring. Curious - are you viewing things on a desktop/laptop monitor, or your phone?
Something else I've been considering (for my use, too) is to build a font-size switcher. Tap a thing to set a larger font size, etc.