The Image block supports all border controls, including Color, Style, and Width.
The new feature was tested well, with one contributing.
“Great job, @aaronrobertshaw getting this to the end! It was tested with several block and classic themes, and it all worked well.
The editor supports crop tools with or without a custom border.
The editor and site editor allows you to set a custom border color.
“Image border in global styles works well