Accessibility - Invoca

These are arithmetic on the values that ship, not asserted.

What it governs

The accessibility properties that live in the token layer: contrast, focus, target size, and motion. Component-level behavior — keyboard maps, ARIA roles, focus management — lives on each component page.

Vocabulary

Term	Means
`focus`	Appears in the specification as both a purpose and a state. `border-focus` is specified — and not implemented. See TITAN-DIV-02.
`alt`	The alternate state, and the contrast-carrying partner of a status colour. On any surface, status text and icons use it.
`invert`	For content on an inverted surface. Its contrast is not guaranteed — see the pairings below.
`disabled`	Exempt from contrast minimums, which is why it must never be the only signal.

Sourced from Invoca’s design-token naming specification, confirmed by its owner as the baseline the design language is being built on. This is the vocabulary of record — not inferred from token names.

The conformance target

Titan targets WCAG 2.2 Level AA. WCAG 2.2 is the current W3C Recommendation and a backwards-compatible superset of 2.1: anything conforming to 2.2 AA also conforms to 2.1 AA. It adds six AA success criteria over 2.1 and marks 4.1.1 Parsing obsolete. Targeting 2.1 would not reduce the work — it would only remove criteria the token layer already governs.

What 2.2 adds, and whether the token layer covers it

Criterion	Level	Bears on	Status
2.4.11 Focus Not Obscured (Minimum)	AA	The `z-*` ladder, sticky headers, drawers	Unaddressed. Nothing prevents a sticky region covering a focused control.
2.5.7 Dragging Movements	AA	Slider, reorderable lists, Dropzone	Component-level, not token-level.
2.5.8 Target Size (Minimum)	AA	`control-height-*`	Covered — see the target size table below.
3.2.6 Consistent Help	A	Page and view composition	Out of scope for Foundations.
3.3.7 Redundant Entry	A	Forms, wizards	Pattern-level.
3.3.8 Accessible Authentication (Minimum)	AA	Login	Out of scope for Foundations.

Criteria carried over from 2.1 that the token layer governs directly:

Criterion	Level	Status
1.4.3 Contrast (Minimum)	AA	Failing for four token pairings — see below.
1.4.11 Non-text Contrast	AA	Failing for `icon-success` and `icon-warning` on light.
2.4.7 Focus Visible	AA	No semantic focus token exists — see TITAN-DIV-02.
1.4.10 Reflow	AA	Not verified anywhere.
2.3.3 Animation from Interactions	AAA	No reduced-motion token exists.

Contrast

What to do about the failures

text-success and text-warning fail on every light surface — 2.41:1 and 2.74:1, below even the 3:1 large-text floor. Use text-success-alt and text-warning-alt.
text-info and text-error pass on white and fail on the page canvas. background-view-background (#f5f6fa) is the more common of the two surfaces. Use the -alt variants for body-size status text anywhere.
White text on the success and warning fills fails badly. A bold status fill needs dark text, and no token expresses that pairing — see TITAN-GAP-07.

Focus

TITAN-A11Y-04 requires a visible focus indicator. Three component-scoped rings ship — form-field-focus-ring, form-field-focus-ring-error, and data-grid-focus-ring — each authored independently against a primitive; outside a Form field or DataGrid there is no semantic token to reach for, so every component decides for itself (known issue — the most consequential accessibility gap in the system).

Constraints

ID	Constraint	Rationale
TITAN-A11Y-01	Text meets 4.5:1, or 3:1 for large text, against every surface it can appear on.	A token that passes on white can fail on the page canvas. Both are surfaces text actually sits on.
TITAN-A11Y-02	Status text and icons use the `-alt` variant.	The plain status tokens measure 2.41:1 and 2.74:1 — not a close call.
TITAN-A11Y-03	Contrast is verified against `background-view-background`, not only `background-default`.	The page canvas is `#f5f6fa`, not white. Two tokens pass on white and fail on the canvas.
TITAN-A11Y-04	Focus is always visible and never removed.	Keyboard users cannot navigate without it. `outline: none` with no replacement removes navigation entirely.
TITAN-A11Y-05	Color never carries meaning alone. Pair with icon, text, or both.	Color vision deficiency, monochrome displays, and bright ambient light each remove color as a channel.
TITAN-A11Y-06	Every transition respects `prefers-reduced-motion: reduce`.	Vestibular disorders make large-area motion physically painful. See TITAN-MOT-03.
TITAN-A11Y-07	Interactive targets are at least 24×24px.	WCAG 2.2 Target Size (Minimum) is an AA criterion. Both shipped control heights clear it; nothing may reduce them further.
TITAN-A11Y-08	Opacity is never used to derive a color variant.	Opacity composites against whatever is behind it, so the resulting contrast is unknowable at author time.
TITAN-A11Y-09	Visual order matches DOM order.	Reordering with CSS leaves keyboard and screen-reader order unchanged, producing focus that jumps around the screen.
TITAN-A11Y-10	Content reflows at 320px equivalent without horizontal scrolling.	This is desktop at 400% zoom, not a phone. A desktop-only product still has to meet it.
TITAN-A11Y-11	A focused control is never obscured by a sticky or overlaying region.	WCAG 2.2 adds this at AA. Titan’s `z-*` ladder makes it possible to cover a focused element with a sticky header and nothing currently prevents it.

What is exempt

These get flagged in review as failures when they are not:

Disabled controls have no contrast requirement. text-disabled at 2.42:1 is conformant — which is why disabled state must never be the only signal that something is unavailable.
Purely decorative icons are exempt from non-text contrast, provided they are hidden from assistive technology and carry no information.
Logos and brand marks are exempt.
Inactive UI components — genuinely non-interactive ones — are exempt.

Testing

Check	How	When
Token contrast	`emit-tokens.mjs --check` — recomputes every ratio from source	Every docs build
Rendered contrast	axe or Lighthouse against the product	CI, every build
Keyboard	Tab through the whole flow with no mouse	Every component PR
Focus visibility	Confirm a visible indicator on every focusable element	Every component PR
Focus not obscured	Tab through with sticky headers and drawers open	Any PR touching `z-*` or sticky layout
Reduced motion	Toggle the OS setting, confirm transitions collapse	Any PR touching motion
Zoom / reflow	400% browser zoom, confirm no horizontal scroll	Any PR touching layout
Screen reader	VoiceOver (macOS) or NVDA (Windows)	Any PR touching semantics or ARIA
Forced colors	Windows High Contrast Mode	Any PR relying on shadow or background to convey state

Automated tooling catches roughly a third of issues. It cannot tell whether an aria-label is accurate, whether focus order is sensible, or whether an error message is comprehensible. The manual checks are not optional.

Known issues

Accessibility: open issues

Divergences, open decisions, and undocumented gaps for Accessibility.

A generated map of which components consume which foundation does not exist yet.

Why it works this way

The -alt variants exist because saturated status colors do not carry text contrast. A green that reads as “success” at a glance measures roughly 2.4:1 on white — about half of what body text requires. Titan keeps the vivid value for fills and supplies a darkened -alt for text and icons. The cost is that authors must know which is which, which is why TITAN-A11Y-02 is a constraint rather than a note. Contrast is arithmetic, not review. A reviewer comparing two swatches cannot estimate a ratio. The failures on this page are the evidence: several ship today in a system that has had design attention. Computing the ratios from token values catches all of them before anyone looks.

​What it governs

​Vocabulary

​The conformance target

​What 2.2 adds, and whether the token layer covers it

​Contrast

​What to do about the failures

​Focus

​Constraints

​What is exempt

​Testing

​Known issues

Accessibility: open issues

​Related

​Why it works this way

What it governs

Vocabulary

The conformance target

What 2.2 adds, and whether the token layer covers it

Contrast

What to do about the failures

Focus

Constraints

What is exempt

Testing

Known issues

Related

Why it works this way