[6.x] Inconsistent widths of outer grey border colors

[helloDanuk]

Bug description

Some UI elements display outer grey borders with different widths, leading to a slightly inconsistent appearance across the interface.

For example: In the blueprint editor the horizontal and vertical outer grey borders are slightly more narrow than in the "Create Group" page. I haven't checked which one is more the default.

How to reproduce

Take a magnifying glass and check the differences, for example on the "Edit Blueprint" and "Create Group" pages.

Logs

Environment

6.0.0-alpha.7

Installation

Fresh statamic/statamic site via CLI

Additional details

No response