To briefly expand on this topic:
Who on earth came up with the idea of using only different shades or intensities of the same color for text and background?
The problem for people with weak eyes wouldn’t exist if complementary colors were used, for a much better contrast.
Same thing with the thin hair lines in the Graph.
A brighter grey on a darker grey background … 
Much too low contrast!
It would help to increase the contrast, yes.
But the best solution would be if the user could configure the colors the way as prefered by hin/her.
Think: Some people can’t tell the difference between red and green.
It wouldn’t help them to have red text on a green background (in Tags).
For me it would be a very good contrast! But not for them.
.
Edit for a supplement:
And because sometimes several people work on the same PC, it should be possible to save several color profiles.
Anytype should be delivered with a predefined and unchangeable color scheme.
But the user should be able to create and save a new color scheme. Another user on the same PC can then create another one and save it under another name.