Is your feature request related to a problem? Please describe.

The greyscale choice is nice and neutral, but it seems terminals on Windows do not map grayscale colors at all (not even inverting them in inverted mode). This leads to sometimes very bad contrast between the foreground color (which is always mapped) and the grey background we hard-wired.

Describe the solution you'd like

Perhaps if we choose a different background color from the basic ANSI set, the chance of it being mapped to a better contrasting color in any scheme is higher.

Describe alternatives you've considered

• not using a background but simply half of the width of the screen for the bar and the other half for the text. (not so nice because it forces every monitor to write extremely short strings
• allowing for multi-line descriptions (more complex ANSI trickery and line-counting to make that work)
• using only an progressing underline (a bit minimalistic)
• learning the scheme by sampling examples (gold plating and will not always work on every terminal)