Contrast Checker Pro by Vantra Labs
Free WCAG 2.1 color contrast checker for web designers and developers. Test hex codes for AA and AAA compliance, get quick-fix color recommendations, and download complete accessibility audit kits.
Added August 10, 2026
· Last analysed August 10, 2026 · via 
StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 10 August 2026; the live site may have changed since.
Contrast Checker Pro by Vantra Labs covers some of the launch checklist, with complete legal pages. Main gaps: missing several security headers, no sitemap, and incomplete email security.
Launched on Product Hunt on August 10, 2026. The site is hosted on Google Cloud. Our crawler found 15 technologies on this site, covering advertising, developer tools, ui library, and AI builders. The stack includes Clerk, Google Funding Choices, and Tailwind CSS.
It's also on one of the most common stacks we track, shared by 707 launches.
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Tech Stack (15)
| DNS |
GoDaddy DNS
|
| Hosting |
Google Cloud
|
| Security | HSTS |
| Auth |
Clerk
(3)
|
| CSS framework |
Tailwind CSS
|
| Developer tools |
Rspack
|
Vite
|
|
| Font |
Google Fonts
|
| UI library |
Lucide Icons
|
shadcn/ui
|
| Advertising |
Google Ads
|
Google AdSense
(2)
|
|
| Consent |
Google Funding Choices
|
| SEO |
Google Search Console
|
| AI builder |
Replit
|
Infrastructure
Email Security
Storage (6)
| Name | Lifetime | Detected as |
|---|---|---|
| FCCDCF | 1y | - |
| GAESA | 29d | - |
| __client | 1y | Clerk |
| __client_uat | 1y | - |
| __client_uat_7jb2ItQB | 1y | - |
| Key | Size | Detected as |
|---|---|---|
| __clerk_environment | 6.2 KB | Clerk |
Readiness Breakdown How?
Performance How?
⚠ 1 images: 1 oversized, 1 without width/height
Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| Recognised AI builder signature | +100 |
This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.