The ramp's top bin is now a label red (#cd2027 — the OKLCh cluster that
Heinz, Campbell's and fire-engine all sit in) so the countries holding the
most unreached people groups read as a heart rather than as clay.
Pins move to Material Orange 800 (#ef6c00) and the selection ring takes over
the navy the pins vacated (#1a237e): an orange pin against the old neon-orange
selection ring measured 1.07 contrast, which would have made the selected
state invisible.
Legend labels the top bin 'heartbeat zone', derived at binLabel() so a host
that moves the threshold cannot strand the name on a bin that is no longer
the top one.
1de86ede8f