indexo.dev

contrast-ratio.org

.org crawl

First seen 2026-04-13 · Last seen 2026-05-02 · ok HTTP/1.1 200 914 ms crawled 2026-05-06

DE · 185.26.156.60 · AS58010 uvensys GmbH

Reputation 100/100

Classifying

HTML metadata

Title
Contrast Ratio: WCAG Color Contrast Checker 🚀
Description
Check the contrast ratio between your website’s background and text colors using this free tool, designed to meet WCAG guidelines
Language
en
Canonical
https://contrast-ratio.org

Technology

Server
nginx

Third-party hosts loaded (2)

  • m0g1.uber.space×1
  • storage.ko-fi.com×1

Social

Registration

Registrar
INWX GmbH
Created
2024-01-15
Expires
2027-01-15 239 days left
Updated
2026-03-01
Name servers
  • ns.inwx.de
  • ns2.inwx.de
  • ns3.inwx.eu

DNS records live

NS
  • ns.inwx.de
  • ns2.inwx.de
  • ns3.inwx.eu
Verified for
  • Google

Email authentication no MX

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-04-02 to 2026-07-01
Expires in 42 days

Full certificate history on crt.sh â†—

HTTP security headers

Header hygiene 75/100 Checked live page: https://contrast-ratio.org/

present
  • strict-transport-security
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • missing Content Security Policy
  • missing Permissions Policy
Header values
referrer-policy
strict-origin-when-cross-origin
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
strict-transport-security
max-age=31536000

Links to (5)

Linked from (1)