# Tessli Source Guide — Who Can Use

Use this source to Shows how color contrast affects people with visual impairments

Tessli guide: /resources/who-can-use
Provider: https://www.whocanuse.com

## Use it when

- wcag-compliance-audit
- accessible-color-selection

## What to explore

- accessibility-checking
- color-palette-generation
- tool
- documentation

## How to access

- **browser (preferred):** Open the canonical provider URL; sign-in and other access requirements are not recorded. Auth: unknown. (https://www.whocanuse.com)

## Important limitations

- Interactive single-pair color tool

## Consider instead

- **Coolors:** Recorded task fit: Color Token Creation. Tessli guide: /resources/coolors. Provider: https://coolors.co.

## Interpretation boundaries

- Repository intelligence is not live-provider verification.
- Revalidate provider access, pricing, licensing, terms, availability, and time-sensitive claims.
- Tessli classifications are research guidance, not provider claims or universal rankings.
- No browser-local Board, Saved, account, cookie, or credential data is included.