FONT SIZE AND CONTRAST ACCESSIBILITY: LEGAL DUTIES AND LIABILITY

1. INTRODUCTION

Font size and colour contrast are essential elements of accessible communication. A font-size or contrast accessibility gap occurs when websites, mobile banking applications, financial documents, digital statements, payment interfaces or customer notices use text that is too small, poorly spaced or insufficiently distinguishable from its background. Such defects can prevent people with visual impairments, older customers and users with limited vision from accessing important information independently.

In banking and financial services, accessibility is particularly important because customers must be able to understand interest rates, charges, repayment obligations, contractual conditions, warnings and transaction confirmations. An inaccessible interface may create legal risks involving disability discrimination, consumer protection, regulatory compliance and contractual transparency.

2. LEGAL FRAMEWORK

A. UNITED NATIONS CONVENTION ON THE RIGHTS OF PERSONS WITH DISABILITIES

The UN Convention on the Rights of Persons with Disabilities (CRPD), particularly Articles 9 and 21, requires accessibility of information, communications and services. It provides an international foundation for accessible digital and public-facing services.

B. EUROPEAN ACCESSIBILITY ACT

Directive (EU) 2019/882, known as the European Accessibility Act, establishes accessibility requirements for specified products and services, including consumer banking services and e-commerce services. It has applied from 28 June 2025, subject to its scope, exemptions and transitional provisions.

C. WEB ACCESSIBILITY DIRECTIVE

Directive (EU) 2016/2102 establishes accessibility requirements for websites and mobile applications of public-sector bodies. It is relevant to government financial services and other covered public-sector interfaces, rather than automatically applying to every private bank.

D. SPANISH LAW

Spain implements public-sector digital accessibility requirements through Royal Decree 1112/2018. Law 11/2023 transposes important provisions of the European Accessibility Act into Spanish law. The General Law on the Rights of Persons with Disabilities and their Social Inclusion, approved by Royal Legislative Decree 1/2013, also provides an important national framework against disability discrimination and in favour of accessibility.

E. TECHNICAL ACCESSIBILITY STANDARDS

The Web Content Accessibility Guidelines (WCAG) 2.2 provide widely recognised technical benchmarks. Relevant criteria include:

WCAG 1.4.3: Minimum contrast.

WCAG 1.4.4: Resize text.

WCAG 1.4.6: Enhanced contrast.

WCAG 1.4.11: Non-text contrast.

WCAG 1.4.12: Text spacing.

For WCAG 2.2 Level AA, ordinary text generally requires a contrast ratio of at least 4.5:1, while large text generally requires 3:1. Text must also be capable of resizing up to 200% without loss of content or functionality, subject to the criterion's conditions.

3. COMMON ACCESSIBILITY GAPS

A. INSUFFICIENT FONT SIZE

Small text in loan agreements, digital statements, fee schedules and banking applications may make essential information difficult to read.

B. LOW COLOUR CONTRAST

Light-grey text on a white background or pale text on a coloured background may prevent users with low vision from distinguishing important information.

C. INACCESSIBLE CONTRACTUAL DISCLOSURES

Important conditions may be technically available but practically difficult to read because of poor typography, cramped layouts or inadequate spacing.

D. FIXED-SIZE DIGITAL INTERFACES

Applications that prevent users from enlarging text or adjusting display settings may create barriers for people with visual disabilities.

E. INACCESSIBLE ERROR MESSAGES

Critical warnings, payment failures and fraud alerts may be displayed in colours or font sizes that users cannot easily perceive.

4. IMPORTANT CASE LAWS

The following cases provide relevant disability-rights, accessibility and equality principles. They should not be misrepresented as judgments specifically establishing numerical font-size or WCAG contrast requirements.

1. Coleman v Attridge Law (Case C-303/06) — DIRECT EU DISABILITY-DISCRIMINATION AUTHORITY

The Court of Justice of the European Union recognised that disability discrimination protections may extend to discrimination by association. The decision supports a broad understanding of disability-related equality obligations, although it did not concern website typography.

2. HK Danmark v Dansk Almennyttigt Boligselskab (Joined Cases C-335/11 and C-337/11) — DIRECT EU DISABILITY-DISCRIMINATION AUTHORITY

The Court of Justice examined disability under EU employment equality law and the obligation to consider reasonable accommodation. Its reasoning is relevant to the interpretation of disability-related accommodation duties, although the dispute concerned employment rather than digital accessibility.

3. Commission v Italy (Case C-312/11) — DIRECT EU ACCESSIBILITY-RELATED AUTHORITY

The Court of Justice considered Italy's failure to implement employment-related reasonable-accommodation requirements. The judgment reinforces the importance of practical measures to remove disability-related barriers.

4. Glor v Switzerland (Application No. 13444/04) — ANALOGOUS HUMAN-RIGHTS AUTHORITY

The European Court of Human Rights examined disability-related unequal treatment. It is relevant to the principle that disability-related distinctions require appropriate justification.

5. Çam v Turkey (Application No. 51500/08) — ANALOGOUS ACCESSIBILITY AUTHORITY

The European Court of Human Rights considered discrimination affecting a visually impaired applicant seeking access to education. The judgment demonstrates that institutions must take disability-related barriers seriously.

6. Enver Şahin v Turkey (Application No. 23065/12) — ANALOGOUS ACCESSIBILITY AUTHORITY

The European Court of Human Rights examined accessibility barriers affecting a disabled university student. It emphasised the importance of meaningful assessment of accommodation needs.

7. V. F. v France (Application No. 7196/10) — ANALOGOUS HUMAN-RIGHTS AUTHORITY

This case should not be treated as a specific font-size or contrast precedent. For a precise legal argument about digital accessibility, the applicable EU and Spanish legislation and technical standards provide stronger authority than attempting to extend unrelated human-rights judgments.

5. LEGAL CONSEQUENCES OF ACCESSIBILITY FAILURES

An organisation may face:

Regulatory enforcement: Failure to comply with applicable accessibility requirements may result in corrective orders or administrative penalties.

Disability discrimination claims: Inaccessible services may amount to unlawful discrimination where the relevant statutory requirements are satisfied.

Consumer-protection disputes: Customers may challenge disclosures that are not presented in an accessible or sufficiently transparent manner.

Contractual disputes: Inadequately accessible information may become relevant to whether a customer received meaningful information about contractual obligations.

Reputational and operational damage: Accessibility complaints may undermine customer confidence and expose weaknesses in digital governance.

A font-size or contrast defect does not automatically invalidate a contract. Liability depends on the applicable law, the nature of the service, the seriousness of the barrier and the evidence of harm or discrimination.

6. PRACTICAL COMPLIANCE REQUIREMENTS

Financial institutions and service providers should:

Adopt WCAG 2.2 Level AA as a technical accessibility benchmark where appropriate.

Maintain at least 4.5:1 contrast for ordinary text and 3:1 for large text under WCAG AA.

Allow text resizing without loss of information or functionality.

Avoid communicating essential information through colour alone.

Test interfaces using screen magnification and assistive technologies.

Provide accessible PDF statements, loan documents and customer notices.

Conduct periodic accessibility audits and document corrective actions.

Include users with visual disabilities in usability testing.

Provide accessible complaint and customer-support channels.

7. CONCLUSION

Font-size and contrast accessibility gaps can prevent customers with visual disabilities from understanding and using essential financial services. European and Spanish accessibility legislation, together with WCAG technical standards, provides a framework for identifying and correcting these barriers. Although the cited judgments do not establish specific font-size or contrast ratios, they support the wider principles of equality, reasonable accommodation and meaningful accessibility. Financial institutions should therefore integrate accessibility into interface design, contractual disclosures, testing and continuing compliance monitoring.