14 — Accessibility¶
A short guide to the card's accessibility features. The deeper theme mechanics are in Theme system; how the colorblind palette is validated is in frontend/render-harness.
Colorblind mode¶
If you have color-vision deficiency, switch to the built-in Colorblind Safe theme: open the Theme tab and click its preset card (it applies immediately, like any other theme).
What it changes: the card leans on color to signal status — success (green), warning (amber), error (red), reference (blue), and muted (grey). In a typical palette several of those collapse together for protan / deutan / tritan vision — red and green especially. The Colorblind Safe palette retunes those five so they stay clearly distinct under all three types of color blindness (it's verified with simulation, not eyeballed), while keeping the card legible for everyone.
Shapes, not just colors¶
Color is never the only cue. On the Map Bounds tab, each status badge also carries a distinct shape so you can tell them apart without relying on color at all:
| Badge | Shape | Meaning |
|---|---|---|
| OK | ✓ | enough confident runs |
| Likely | ◐ | a few runs — bounds are forming |
| No bounds | ! | nothing learned yet |
| Outlier | ✕ | a run that disagrees with the others |
| Excluded | – | a run you've removed from the bounds |
| Baseline | ◆ | the protected reference run |
These marks are always on, in every theme — the Colorblind Safe theme just adds the matching color tuning on top. They're chosen to stay distinguishable even in pure grayscale, so they also cover full color blindness (monochromacy).
Only on models with CV map bounds
The Map Bounds tab — and the shaped status badges above — is a learned-bounds feature that appears on Eufy. Brands that track the current room natively (Roborock S6) don't build CV map bounds, so the tab is hidden there and these badges won't appear. All the color and Colorblind Safe guidance on this page is brand-agnostic and applies everywhere.
The badge is earned, not claimed¶
Any theme can carry the Colorblind Safe badge — it is not reserved for the built-in preset. But the badge is verified, never just asserted. An author can ask for it, yet the card runs a real check and withholds the badge (with a reason) unless the theme actually passes.
The check works on the four status colors — success, warning, error, and info — and asks a simple question: if you couldn't see color the way most people do, could you still tell these four apart? To answer it without guessing, the card:
- simulates each status color under the three dichromacy types — deuteranopia, protanopia, and tritanopia — using the standard Machado (2009) matrices;
- measures how far apart each pair of colors lands (in CIELab, the ΔE distance);
- fails the theme if any pair of statuses collapses too close together under
any of the three — below a fixed separation floor (
CVD_DELTA_E, currently 19, roughly "clearly different at a glance").
If even one pair would be hard to distinguish, the badge is withheld and the result tells you exactly which pair, which vision type, and how close they landed — so a theme author knows what to fix.
"Best for" your kind of color vision¶
The filter bar groups vision types into two plain-language buckets, because those are the terms people actually recognize:
- red-green — covers both deuteranopia and protanopia (the common type, affecting around 8% of men);
- blue-yellow — tritanopia (rare).
The buckets live in the filter because they're the words you'd search for. The precise medical term stays available in the per-theme detail, so nothing is dumbed away — the simpler label is just the front door. A red-green bucket is deliberately conservative: since someone with red-green deficiency can't tell which of the two subtypes they have, the bucket reports the tighter (worse) of the two simulations.
A theme that passes the check is also tagged with the bucket it handles best — its strongest vision type. That shows up in the Best for filter, so you can narrow the gallery or the card's theme picker to, say, "Best for red-green" and see the themes tuned most strongly for your own vision. Only themes that have earned the Colorblind Safe badge carry a "Best for" tag.
Other niceties¶
- Keyboard: press Esc to close any open modal.
- High Contrast theme: if you want maximum contrast rather than colorblind tuning specifically, the High Contrast preset is also available in the Theme tab.