EU Sovereignty Score
Self-hosted / open sourceTesting & QAHeadquarters: US

Colour Contrast Analyser: sovereignty score and 8 European alternatives

Colour Contrast Analyser (CCA) is a free desktop tool for checking whether the colour contrast of text and visual elements meets the WCAG guidelines (2.0, 2.1 and 2.2). You enter colours as HEX, RGB, HSV or HSL, pick them from the screen with an eyedropper and adjust them with sliders. The tool also includes a colour-blindness simulator. According to the publisher it can be used for websites, apps, social-media graphics, presentations and PDF files. The program is installed locally, for Windows and macOS.

The source code lives in the GitHub organisation of TPGi (The Paciello Group) under GPL-3.0 or later. The product page is published by Vispero, which is based in Clearwater, Florida, US; TPGi's own page redirects there. The software runs on your own computer, but questions and bug reports go through the US maintainer. For a European organisation this is a small utility with no cloud component. The most recent release dates from September 2025.

See the 8 European alternatives ↓Assess your stack with Colour Contrast Analyser pre-selected
MastodonLinkedInBlueskyXEmail
Sovereignty score
69 / 1000 = high exposure
100 = sovereign
  • Jurisdiction SOV-210
    Headquartered in the US: CLOUD Act and FISA 702
  • Data residency SOV-3100
    No hosting in Europe (US)
  • Cryptographic key sovereignty SOV-390
    Self-hostable: encryption keys under your own control
  • Freedom from lock-in SOV-680
    Open source: low switching costs
  • Source & runtime sovereignty SOV-4 · SOV-665
    Source code auditable, forkable and self-hostable

SOV codes: the matching objective in the European Commission's Cloud Sovereignty Framework. Official source

How the score is calculated

Facts and evidence

Last checked October 14, 2026
Headquarters
US (US)Verified by hand
EU adequacy decision
Only for companies individually certified under the EU-US Data Privacy FrameworkVerified by hand
Sovereignty model
Open-source, distributedVerified by hand
Data hosting
USVerified by hand
Open-source
YesVerified by hand
GDPR-compliant
NoVendor-stated
Category
Testing & QA
Type
Product
Website
vispero.com ↗

How we verify · Something wrong? Suggest a correction

Top EU-based & GDPR-compliant alternatives to Colour Contrast Analyser

The European alternatives to Colour Contrast Analyser come from our knowledge base of over 8,400 vendors. We only list vendors headquartered in the EU or the EEA; fully European-owned vendors rank before vendors with a foreign owner. For each alternative you see the country, the open-source status and a short description.

Score per alternative: 0 = high exposure, 100 = sovereign

46 European Testing & QA vendors are in the catalogue. View the whole category · Submit an alternative · View category on the map

Is Colour Contrast Analyser one of many dependencies?

Score your whole stack in about three minutes. Free, no account needed.

Assess your stack →View a sample report (opens in a new tab)

Why digital sovereignty matters with Colour Contrast Analyser

Colour Contrast Analyser is headquartered in the United States. US vendors fall under the CLOUD Act and FISA 702: US authorities can compel access to data, even when that data sits in a European data centre. That is the core of the jurisdictional exposure in our model.

Colour Contrast Analyser hosts data outside the EU (US). Personal data therefore leaves the EU, which requires a transfer mechanism under the GDPR and pulls the data residency score down.

Colour Contrast Analyser is open source. You can audit the source code, self-host the software and keep the encryption keys under your own control. Switching is easier because data and software are not tied to a single party.

What this means for your organisation depends on your whole stack and context. The free assessment weighs Colour Contrast Analyser together with your other vendors and gives a total score, a heatmap and the main risk drivers.

Frequently asked questions

What is the best European alternative to Colour Contrast Analyser?

It depends on your use case. Strong EU alternatives to Colour Contrast Analyser include AbsInt, aqua cloud and Argos CI. On this page you can compare 8 EU alternatives by jurisdiction, data residency and open-source status.

Are there open-source alternatives to Colour Contrast Analyser?

Yes. Open-source EU alternatives to Colour Contrast Analyser include Argos CI, Asqatasun and Assistant RGAA. These keep your data fully under your own control and let you self-host if you want to.

Is Colour Contrast Analyser GDPR-compliant and where is the data hosted?

Colour Contrast Analyser is headquartered in US and hosts data in US. Its GDPR compliance is limited or unclear. For full EU data residency the EU alternatives on this page usually offer more certainty.

Details and sources

Verified by handHeadquarters, owner, hosting locations and licence have been checked by us against public sources. Free of charge and for every vendor, not a paid label. Nothing in this knowledge base is taken over automatically. Last checked on October 14, 2026.

Sources

Public sources used in the latest check of this record.

Compliance evidence

The links below point to the vendor's own public documents. We only record what we found: a missing link means "not found publicly", not "not compliant".

No public compliance evidence has been recorded for this vendor yet. Do you know its DPA or subprocessor list? Something wrong? Suggest a correction

In the changelog

Earlier changes to this page, as listed in the public changelog.

Digital sovereignty in Testing & QA

Testing & QA: Software testing, test automation, browser testing and quality assurance. In this category the choice of vendor determines who has legal access to your data, where that data lives and how easily you can switch later.

Also in this category

See all →
Open in the alternatives dashboardMissing a vendor? Submit itAre you this vendor? You can also become a sponsor on the Testing & QA page — with no effect on your score
8 European alternatives to Colour Contrast Analyser — GDPR-compliant & EU-hosted · EU Sovereignty Score