Android Question radio button

Hi,

Am I the only one ?, but it seems to me that:
- Inside the same panel
- 2 radio buttons, one checked, one unchecked (obviously)

The visual difference (= contrast) = very small with lighter colors between the checked and unchecked.
In design mode, it is very clear because the bullett is black.

I tried different color combinations and found a dark blue BG (with white letters,)
showing a good contrast.

Any other recommendations ?

thx,
Paul