# Design & Color Tools

> Check color contrast ratios for WCAG compliance, simulate color blindness, and calculate aspect ratios — free design helpers that run entirely in your browser.

## Tools in this collection

- [Paleta de Cores + Verificador WCAG](https://www.teafun.cyou/tools/color-palette-wcag/) — Verifique proporções de contraste, conformidade AA/AAA, gere variantes de paleta e exporte tokens de cor CSS ou Tailwind v4 localmente.
- [Teste de daltonismo](https://www.teafun.cyou/tools/colorblind/) — Teste sua visão cromática com placas no estilo Ishihara otimizadas para gamers.
- [Calculadora de Proporcao](https://www.teafun.cyou/tools/aspect-ratio/) — Calcule proporcoes de imagem instantaneamente. Converta dimensoes, resolva lados ausentes e consulte tamanhos de imagens para redes sociais 2025/2026.

## FAQ

### Which contrast ratio do I need to pass WCAG AA?

Normal text requires a 4.5:1 ratio; large text (18pt+ or 14pt bold) requires 3:1. The WCAG Color Contrast checker shows both thresholds and your pass/fail status instantly.

### How does the color blindness simulator work?

It applies standard daltonisation matrices to the input colors to approximate how they appear with different types of color vision deficiency — all computed locally in your browser.