Check the contrast between different colour combinations against WCAG standards

Latest Version

Version
2.0.1
Update
August 15, 2024
Size
378KiB
Developer
colourcontrast.cc
Category
Users
40,000+
Rating
3.90323 ★
Manifest Version
3
Web Store Status
Languages Support
English (UK)
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Permissions
ActiveTab
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Colour Contrast Checker Extension

Compare the contrast ratio of 2 colours, background and foreground, within a webpage against level 2 of the Web Content Accessibility Guidelines (WCAG).

*More information about understanding colour contrast:
https://webaim.org/articles/contrast/

Features

- Use the text fields to compare colours using Hex codes or colour names
- Use the colour picker tool to compare colours on a webpage
- Store up to 20 colour combinations you have compared (uses local storage) to refer back to later
- Reverse background and foreground colours
- Generate a share link of colours compared

Once you have installed the extension you may need to reload the webpage you are currently on to begin using the extension.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "name": "Colour Contrast Checker", "short_name": "CC Checker", "description": "Check the contrast between different colour combinations against WCAG standards", "version": "2.0.1", "action": { "default_title": "Open CC Checker" }, "icons": { "48": "./favicons/favicon-48x48.png", "72": "./favicons/favicon-72x72.png", "96": "./favicons/favicon-96x96.png", "144": "./favicons/favicon-144x144.png", "256": "./favicons/favicon-256x256.png" }, "permissions": [ "activeTab" ], "web_accessible_resources": [ { "resources": [ "index.html", "fonts/avenir-next-variable.woff2" ], "matches": [ "" ], "use_dynamic_url": true } ], "background": { "service_worker": "./app/background.js" }, "content_scripts": [ { "matches": [ "" ], "js": [ "./app/content.js" ], "run_at": "document_idle", "all_frames": true } ]}
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How to download and manually install Colour Contrast Checker extension for Chrome

Looking for a way to install Colour Contrast Checker extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Colour Contrast Checker extensions manually, this article outlines two simple methods to effortlessly install Colour Contrast Checker extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Colour Contrast Checker extension and manually install through Drag &Drop

If you ever need to manually install a Colour Contrast Checker extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Colour Contrast Checker Extension by clicking the "Download CRX" button on the website.

Look for the Colour Contrast Checker extension you wish to install. Go to the website and download the Colour Contrast Checker extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Colour Contrast Checker extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Colour Contrast Checker extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Colour Contrast Checker extension for Chrome and install in Developer Mode

This is another method to install Colour Contrast Checker extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Colour Contrast Checker extension file

Select and download the Colour Contrast Checker extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Colour Contrast Checker extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Colour Contrast Checker extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Colour Contrast Checker extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Colour Contrast Checker extension in 2 ways. We hope this guide proves helpful.

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User reviews

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John Doe (ID: 0000003c9a6e0c72) Voted 4 ★ - Updated 09/11/2023 Good, but I would've loved RGB values too, and a comparison between each of the RGB values

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Pablo Alvar mcv (ID: 0000009afd0ed95e) Voted 5 ★ - Updated 04/11/2023 muy útil y muy buen diseño. Enhorabuena y gracias!

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Brad Chapman (ID: 0000009ca94f4f5b) Voted 1 ★ - Updated 12/08/2022 Didn't work.

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Christian Kodehode (ID: 000000df3a83cb9e) Voted 5 ★ - Updated 08/18/2022 Edit: Initially this extension refused to activate after I installed it. However, once I went into my browser's extensions settings and opened the details for this extension where I manually enabled access to file URLs (this was disabled by default) and then restarted my browser, it started working. The same solution applies to similar extensions I tested, and this works on both Chrome and Vivaldi.

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Aesha Patel (ID: 0000002d44aa3113) Voted 5 ★ - Updated 06/24/2022 I figured it out, open the link, and then hold the click on the extension for 2 s. and it will pop down.