color-blindness.com

https://color-blindness.com· First analyzed 02 May 2026· Updated 02 May 2026

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color-blindness.com

Mobile

Sponsored

Hosting Provider

Metanet AG

IP Address

46.231.204.8

Site Location

🇨🇭 Switzerlandvia ip

Server Location

🇨🇭 Zurich, Switzerland

ASN

AS21069

Organization

Metanet AG

Server

Nginx

Nameservers

nl.pro.io.p.dnh.net.ch.pro.io.

Performance

Core Web Vitals

Weight

First Contentful Paint

976 ms10%

Speed Index

1.3 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

120 KB

24 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.4

cms

Quarkv1.4.1

by Anthony Hortin

View Theme

Technology Stack

10 Technologies Detected

CSS Frameworks

Analytics

Libraries

Other

Icon Libraries

Web Servers

Languages

Plugins

SEO Analysis

C61/100

Meta Tags7/15

Content11/12

Headings8/8

Technical19/25

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile2/4

Indexability3/3

color-blindness.comcolor-blindness.com

Colblindor – All about Color Blindness

No description available for this page.

Title Length38 chars

Recommended: 50-60 chars (~218px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Most images missing alt text (12/12) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

4 URLs

4 sub-sitemaps

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

11/100

Poor

3 12 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D45/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

14/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

navheader/footer

Text ratio:8%

Words:1,274

Token eff.:Optimal

Sections/1K:8.6

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary80w

Descriptive Headingsavg 4.2w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

AI readiness recommendation preview...

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Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

66/100

Passed

Critical

Warnings

Images & Alt Text

5/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

15/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

13/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

3/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

1 recommendation

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

60/100

A+

15 mg

CO₂e / view

120.1 KB

Page Weight

95%

Cleaner Than

New Visitor

17 mg

Returning (cached)

9 mg

Annual (10K/mo)

1.8 kg

Emission Segments

Data Center

3 mg

Network

4 mg

Device

8 mg

Resource Breakdown

JavaScript

3.0 KB

Images

70.9 KB

CSS

28.8 KB

HTML

16.5 KB

Other

839 B

Green Hosting Not Verified

Metanet AG

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

73%Good

Static / Informational

HTTPS

No WAF

49d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

23.03.2026

Valid Until

21.06.2026

Subject Alternative Names (6)

colblindor.comcolor-blindness.comfarbenblindheit.dewww.colblindor.comwww.color-blindness.comwww.farbenblindheit.de

SHA-256 Fingerprint

61:DA:C2:09:60:1C:35:15:F2:7B:36:90:5E:73:9A:82:1E:55:AF:33...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Sat, 02 May 2026 01:47:58 GMT

link

<https://www.color-blindness.com/wp-json/>; rel="https://api...

permissions-policy

private-state-token-redemption=(self "https://www.google.com...

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

color-blindness.com

Domain Information

color-blindness.com

Domain Age

17 years

Created

06.04.2009

Expires

06.04.2027

Last Updated

07.04.2026

Registrar

1API GmbH

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

59/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Arvo + PT Sans

WCAG Partial

72/100

Readability

/30

27/30

16px · LH 1.50

Hierarchy

/20

13/20

3.5x ratio

WCAG

/25

16/25

3.44:1 min contrast

Performance

/25

16/25

2 fonts

Heading Font

Arvo

Serif56px

Body Font

PT Sans

Sans16px

Contrast Ratio

3.44:1

1 issue

Reading Comfort

~39 CPL

Narrow lines

56px

24px

28px

24px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.4:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 3.5x larger than body text.

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 51

Color Palette

6 unique colors

11.06:1 AAA Light

#fafafa

Background· 40.50000000000001%

#393939

Text· 37.400000000000006%

#d3d9c8

Primary· 4.8%

#fdfdd4

Accent· 2.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.color-blindness.com(6)googletagmanager.com(1)color-blindness.com(1)

Website Identity

color-blindness.com

17 years old

Location detected: 🇨🇭 Switzerlandvia ip

1API GmbHen-US

Sponsored

Last analyzed: 02 May 2026 at 01:48

Historical Analysis & Change Tracking