Markers sit on two very different surfaces - the light blueprint on white and
the dark blueprint over the near-black navy card - but the palette only ever
suited one. The grey "no subtype" default sat at 1.88:1 against white and the
orange asset-type step at 2.16:1, so both effectively disappeared on the light
blueprint. The fixed white ring made it worse: on white it added nothing.
Re-step the asset-type colors to versions of the SAME hues that clear 3:1
against both surfaces, replace the grey default with a neutral that clears
5.4:1 / 3.7:1, and derive the ring from the fill's luminance (light fill ->
dark ring, dark fill -> light ring) so every marker keeps a hard edge on
either background. The ring also rescues a washed-out color a user picks by
hand for a subtype, which no palette change can reach. The PDF export applies
the same rule to its markers and legend swatches, keeping print in parity.
Colors were chosen against a contrast/CVD validator rather than by eye. Note
that five simultaneous hues cannot all stay distinguishable under color-blind
simulation - past roughly five subtypes on screen, the legend and the hover
tooltip carry identity.
Adds computed contrast assertions so a future palette edit cannot
reintroduce a washed-out step.
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