hmm if u cant make it white, keep it black but the background make it white and flat no gradient,

the the menu, i would suggest making bold text and white, and to totaly improve readabily make the background get darker and not sharp, (possible with homescreensettings, just the statusbar needs to be optimized, isint it possible to make the statusbar have an invisble background? and to play regarding the background? or since its Css
it should work like this that it has teh same background of the systembackground but it takes just a part of it:
width : whatever
height: statusbarhight
background:url left top;

but idk if its even css

3G Icon imo is total unreadable same goes for the clock, suggest to make them bolder

is it possible to change the statusbar regarding the app runing? than i would suggest to make it change background color regarding the app rather changing every apps header, u could try to make a statusbar ontop the old on when an app launches i dont know how the theming works but it seems like css?

I mean the normal buttons, the got a border which right now are black ( Buttons with Text)

the toolbar has a bit too dark line at top i would make it lightgray would fit better

it would also be very nice to have a background for the apps that changes depending on ur selected background