Yes. All 42 tools are 100% free with no signup, no ads in your face, and no hidden limits. The core tools will always be free.

Do AHX tools upload my data to a server?

No. Every tool runs entirely in your browser using JavaScript. Your data never leaves your device.

Can I use AHX offline?

Yes. Once the page has loaded, every tool works without an internet connection. AHX is installable as a PWA.

Free Color Picker Guide — HEX, RGB, HSL, CMYK, HSV

Colors are represented in multiple formats for different use cases. This guide explains each format and how to use the free AHX Color Picker tool.

Color formats explained

• HEX: #FF6B35 — used in HTML/CSS, most common for web
• RGB: rgb(255, 107, 53) — used in CSS and image processing
• HSL: hsl(16, 100%, 60%) — intuitive for designers (hue, saturation, lightness)
• HSV: hsv(16, 79%, 100%) — used in graphics software
• CMYK: cmyk(0%, 58%, 79%, 0%) — used for print

WCAG contrast checker

The AHX Color Picker includes a WCAG contrast checker that shows whether text is readable on a given background color. This is essential for accessibility compliance.

The tool also generates 5 color harmonies: complementary, analogous, and triadic colors — perfect for designers building color palettes.