- Add the Blueprint scheme: navy canvas, pale blue sheet, dark navy part
outlines, orange-red rapids and twelve distinct, readable part fills.
- Use it as the settings default and the fallback for unknown scheme names,
and list it first in Options. Saved scheme choices are kept.
- Run the palette spacing and readability tests over Blueprint and Classic.
- Document the default in nesting-view-colors.md.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>