Currently, the count indicator background and color are hardcoded to black and white in an attempt to maximize contrast, at the expense of being too prominent even when not needed.
{F13673333, size=full}
Changing the background color to match the row (or any other element) background, would make it look like the data-block icon is masked out, improving readability while not standing out too much.
This would also allow for a larger circle size so the text doesn't overflow.
The circle background color should not have transparency, as it does now. And the text inside should match the color of the text used for the parent element (instead of hardcoded white). This should make it look good in any theme.
Before:
{F13673324, size=full}
After (mockup):
{F13673323, size=full}