v0.1.0-alpha.65

Nacre's terminal text is readable again. alpha.64 shipped a palette whose
bright white measured 3.26:1 on the white background -- below AA -- and
shell prompts write ordinary text in that slot constantly, so screens
read as blank. The whole neutral ramp is recut for a light ground: every
slot now clears 4.5:1, ordered dark to light.

The chrome surfaces are pulled toward white as well. surfaceChrome sat
6.1 CIEDE2000 from the terminal's background, which read as a mismatched
seam rather than a hierarchy.