iTerm2 on the Mac has this. It's a "minimum contrast" slider from 0 to 100% which does what you'd expect. It's nice that it's adjustable. Windows Terminal ha

iTerm2 on the Mac has this. It's a "minimum contrast" slider from 0 to 100% which does what you'd expect. It's nice that it's adjustable. Windows Terminal has something like this, but finds a way to screw it up. I use Windows Terminal for development over SSH in my current job. It has a checkbox "Automatically adjust lightness of indistinguishable text" (non-adjustable), but it doesn't seem to change the cursor. Whatever colour I set the cursor to, whatever shape, and even with blinking, the cursor is nearly invisible in some of the terminal tools I use, when it is close to the background colour. Even ancient terminal emulators pick a contrasting colour for the cursor. It is an obvious requirement, and Windows Terminal does the opposite, so you can see text but not the cursor.