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colours.cz

https://colours.cz· First analyzed 14 May 2026· Updated 14 May 2026
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colours.cz
Desktop screenshot of colours.cz
Mobile screenshot of colours.cz
Mobile

Sponsored

Hosting Provider

Hetzner
hetzner.com

IP Address

49.13.254.135

Site Location

🇨🇿 Czech Republicvia tld

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS24940

Server

Nginx

Nameservers

ns2.websupport.cz.ns3.websupport.eu.ns1.websupport.cz.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
418 ms10%
Speed Index
543 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
25 MB
55 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
CMS
WordPress
Infrastructure
Hosting
Hetzner

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

11 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

Plugins

3
WPML
Yoast SEO
WPML

UI Components

1
Fancybox

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Email Marketing

1
Mailchimp

Web Servers

1
Nginx

SEO Analysis

A84/100
25
6
0
Meta Tags11/15
Content11/12
Headings6/8
Technical25/25
E-E-A-T3/7
Images6/7
Links4/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
C
colours.czcolours.cz

Colours of Ostrava | 15–18/07/2026

Vychutnejte si multižánrový festival Colours of Ostrava. Hudbou našlapané čtyři dny, které vydají za celý rok zážitků!

Title Length34 chars

Recommended: 50-60 chars (~204px / 580px)

Description Length118 chars

Recommended: 120-160 chars

Issues (0)

    6 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    10 URLs

    10 sub-sitemaps

    robots.txt

    3 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    18/100
    Poor
    5 13 1

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

    Sponsored

    AI & LLM Readiness

    D50/100
    Bot Access
    20/25
    Machine Read.
    13/25
    Schema Data
    5/25
    Citation
    12/25

    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
    nav
    Text ratio:2%
    Words:536
    Token eff.:Optimal
    Depth:1/5

    Structured Data

    3 JSON-LD
    WebSiteEventBreadcrumbListSearchAction

    Citation Readiness

    Opening Summary
    Descriptive Headingsavg 3.3w
    Canonical URL
    Open Graph3/3
    Twitter Card1/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    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.
    B
    79/100
    11
    Passed
    2
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    18/20
    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
    9/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    2/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    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.
    44/100
    F
    2.58 g
    CO₂e / view
    25.0 MB
    Page Weight
    5%
    Cleaner Than
    New Visitor
    2.95 g
    vs
    Returning (cached)
    1.48 g
    Annual (10K/mo)
    309.9 kg
    Emission Segments
    Data Center
    127 mg
    Network
    759 mg
    Device
    1.70 g
    Resource Breakdown
    JavaScript
    169.0 KB
    Images
    1.6 MB
    CSS
    342.3 KB
    HTML
    16.7 KB
    Other
    22.8 MB
    Green Hosting Verified
    Hetzner Online GmbH
    GWF Verified
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A+

    Security Score

    91%Excellent
    Static / Informational

    HTTPS

    No WAF

    41d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    26.03.2026

    Valid Until

    24.06.2026

    Subject Alternative Names (2)

    colours.czwww.colours.cz

    SHA-256 Fingerprint

    ED:B6:1F:DA:17:25:2D:3B:94:C0:48:2C:FC:5F:34:5C:81:F1:EB:2A...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🟡 3s(max-age=3, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-length
    16844
    content-type
    text/html; charset=UTF-8
    date
    Thu, 14 May 2026 15:19:01 GMT
    server
    nginx
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (1)

    mx.web4u.cz

    Domain Information

    colours.cz

    Domain Age
    24 years

    Created

    08.05.2002

    Expires

    06.05.2027

    Last Updated

    29.04.2026

    Registrar

    REG-ACTIVE24

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot

    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.
    C
    67/100
    Mobile Friendly
    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, shrink-to-fit=no, viewport-fit=cover
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    InterDisplay

    WCAG Partial
    71/100
    Readability
    /30
    25/30

    16px · LH 1.50

    Hierarchy
    /20
    20/20

    2.5x ratio · ✓ H1→H6

    WCAG
    /25
    13/25

    1:1 min contrast

    Performance
    /25
    13/25

    1 font · 3 req

    Heading Font

    InterDisplay

    Sans40px

    Body Font

    InterDisplay

    Sans16px

    Contrast Ratio

    1:1

    4 issues

    Reading Comfort

    Single Font Family

    left aligned
    40px
    h1
    40px
    h2
    18px
    h3

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

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

    ⚠️ Hard to read: Flesch score 32/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 4 elements below WCAG AA threshold (min 1.0:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 2.5x larger than body text.

    Buy on MyFontsFlesch 32

    Color Palette

    11 unique colors
    21:1 AAA Light
    #ffffff
    Primary· 29.499999999999996%
    #000000
    Background· 15.3%
    #feef03
    Primary· 13.8%
    #883e94
    Secondary· 8.7%
    #c02383
    Accent· 7%
    #c1ba86
    Secondary· 5.9%
    #d2d88f
    Secondary· 5.8%
    #d84448
    Accent· 5%

    Business & Marketing Stack

    4 Tools Detected

    Enterprise

    Marketing Automation

    1
    MailchimpSMB

    Email marketing and automation platforms

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    1
    Facebook PixelMid-Market

    Ad platforms and retargeting pixels

    3

    Categories

    4

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    19 Resources

    18
    Scripts
    1
    Styles
    12
    Async
    1
    Defer

    Top Script Sources

    colours.cz(7)googletagmanager.com(3)connect.facebook.net(2)cdn.jsdelivr.net(2)chimpstatic.com(1)

    Website Identity

    Colours of Ostrava

    Event
    www.colours.cz
    24 years old
    Location detected: 🇨🇿 Czech Republicvia tld
    REG-ACTIVE24cs

    Sponsored

    Last analyzed: 14 May 2026 at 15:19

    Historical Analysis & Change Tracking