=================== Option A  Instrument ===================
ground #0B0E10  surface #12161A  ink #E4E8EB

== WCAG contrast (text 4.5:1, marks and large text 3:1)
  ink                      on ground 15.71   on surface 14.75   L*  91.8
  neutral (ink 72%)        on ground  8.59   on surface  8.06   L*  70.6
  unknown (ink 54%)        on ground  5.38   on surface  5.05   L*  56.2
  stale (ink 54%)          on ground  5.38   on surface  5.05   L*  56.2
  evidence+ #72C3E6        on ground  9.83   on surface  9.23   L*  75.0
  weakening #C8742E        on ground  5.53   on surface  5.19   L*  57.0
  safety #D6336C           on ground  4.19   on surface  3.94   L*  49.2
  user #E9E3A4             on ground 14.74   on surface 13.84   L*  89.4

== CIEDE2000 between semantic hues: normal / protan / deutan / tritan
   (dE < 10 on a small mark is hard to tell at a glance; < 5 near-identical)
  evidence+  vs weakening   46.8   46.1   46.7   58.4
  evidence+  vs safety      60.1   33.8   34.5   68.5
  evidence+  vs user        39.0   37.3   40.7   34.8
  evidence+  vs neutral     17.5   14.0   15.4   21.6
  weakening  vs safety      34.4   33.5   16.2   10.5
  weakening  vs user        33.9   28.3   23.2   30.7
  weakening  vs neutral     29.9   30.0   28.3   31.1
  safety     vs user        57.7   47.9   28.6   39.7
  safety     vs neutral     33.3   28.3   19.6   28.7
  user       vs neutral     25.1   24.8   25.2   18.7

  worst pair, any vision type: dE 10.5

=================== Option B  Survey ===================
ground #100F0D  surface #181714  ink #ECE7DC

== WCAG contrast (text 4.5:1, marks and large text 3:1)
  ink                      on ground 15.54   on surface 14.54   L*  91.8
  neutral (ink 64%)        on ground  7.01   on surface  6.56   L*  64.5
  unknown (ink 54%)        on ground  5.37   on surface  5.02   L*  56.5
  stale (ink 54%)          on ground  5.37   on surface  5.02   L*  56.5
  evidence+ #8CC9C1        on ground 10.25   on surface  9.59   L*  76.8
  weakening #C4703F        on ground  5.23   on surface  4.90   L*  55.8
  safety #E8E2F8           on ground 15.20   on surface 14.23   L*  90.9
  user #D9A94E             on ground  8.88   on surface  8.31   L*  72.0

== CIEDE2000 between semantic hues: normal / protan / deutan / tritan
   (dE < 10 on a small mark is hard to tell at a glance; < 5 near-identical)
  evidence+  vs weakening   43.1   29.7   30.3   53.7
  evidence+  vs safety      28.2   12.6   11.1   24.7
  evidence+  vs user        33.2   24.6   29.2   44.5
  evidence+  vs neutral     21.4   11.4   12.0   27.6
  weakening  vs safety      39.5   43.1   39.9   36.4
  weakening  vs user        21.3   16.7   12.7   15.1
  weakening  vs neutral     23.7   20.4   19.3   24.0
  safety     vs user        37.1   38.0   36.2   25.5
  safety     vs neutral     23.8   23.2   22.7   19.3
  user       vs neutral     22.0   21.5   22.0   19.9

  worst pair, any vision type: dE 11.1