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Accessibility tools to bookmark

From: Web Accessibility Principles

Video: Accessibility tools to bookmark

>> Now let's look at some accessibility tools that are online that you can bookmark and use for testing your pages. Four of these tools are listed on the screen with their URLs. You may want to pause the movie at this point to write them down and load them in your browser. I'm going to use the same page from the W3C that we've been testing in these four tools. The URL of it again is www.w3.org/wai/eo/2005/demo/before/index.

Accessibility tools to bookmark

>> Now let's look at some accessibility tools that are online that you can bookmark and use for testing your pages. Four of these tools are listed on the screen with their URLs. You may want to pause the movie at this point to write them down and load them in your browser. I'm going to use the same page from the W3C that we've been testing in these four tools. The URL of it again is www.w3.org/wai/eo/2005/demo/before/index.

Go to the address bar and hit Ctrl C or Cmd C to copy the URL. Then open up the first tool at the URL colorfilter.wickline.org. This tool asks you to put in an URL to a page and then choose a type of colorblindness to emulate on that page. Go down to the type URL box and hit Ctrl V or Cmd V to paste in the URL. In the Select box below you'll need to pick a type of color filter. The filters shown are different types of colorblindness.

The two at the top, the red-green colorblindness are the most common. So you might want to start with testing those. I'm going choose protanopia. Then click the Fetch and Filter button. The tool will load the page with different colors to simulate this kind of colorblindness. It might take a few minutes for it to load all of the images since it has to remake them. You can see that the colors and the images have changed dramatically. The red and green from the images has basically been stripped out.

This box on the right-hand side of the page allows you to choose different settings to test your page with different types of colorblindness. Let's go to the second tool now. Go to the URL www.vischeck.com/vischeck/vischeckimage.php. This is another tool for emulating different types of colorblindness, but with this tool you up load and image file to check. Go down to the image file box and click on the Browse button.

If you're following along with the exercise filed, inside the Chapter Two folder is an image named coffee. Select that image and click Open. Now you can click on the run vis check button to change this image for how it would look for this chosen type of colorblindness. Once again it will take a few moments while the tool up loads the image and changes its colors. Let's scroll down the page to see the full image.

You can see that with this type of colorblindness it's impossible to distinguish the different colors in these coffee beans. So for instance if you had a chart or another type of image where color was important and you're asking your users to choose something based on that color, it would be impossible for them to do so in those sorts of situations. The third tool that we're going to look at is at www.snook.ca/technical/color_contrast/color.html.

This tool does the same thing that the Firefox extension we downloaded earlier does. It checks the contrast between the text color and its background color. The difference between this tool and the tool, however, is that this one allows you to quickly change the colors so that if you are failing a certain color contrast test you can quickly choose a new color and see if it passes. To change the colors, scroll down to either the foreground color or the background color box. I am going to change the background color. There are three sliders to change the red, green, and blue values.

Click on the red slider and move it to the left. You'll see in the results box to the right the calculated brightness difference and color difference, and then whether or not these values are compliant. It will either say yes, no, or sort of. Sort of means that it only passes one of the two tests. Ideally, you would want it to say yes. So let's keep moving the slider to the left. Now it says no. So we definitely want to change these colors. Going all the way to the left has just made it worse. Let's slide this back to the right.

We now have a value of yes, meaning we pass the color contrast test. The last tool is a readability test. It's online at juicystudio.com/services/readability.php. If you scroll a little ways down the page you'll see a form labeled test the readability of a web site. Here you can put in a URL and click the Calculate Readability button to have the tool measure how easy it is to read and understand the text on the page. Click inside the box, and once again hit Ctrl V or Cmd V to paste in the same URL that we used earlier.

Then click on Calculate Readability. A report will come up showing you information about the text on the page you just checked. The three rows at the bottom of the table are the names of three tests. The Gunning Fog index and Flesh Kincaid Grade. Both assign you a number that corresponds with the grade level that this would be appropriate reading for. The flesh reading this under is between 1 and 100. Generally, you want to get a value between 60 and 70. So it looks like this page will be easy to read for a number of people. These are just a few online tools that you can bookmark and use for testing.

Next we'll look at some other tools online that give you a more comprehensive analysis of the accessibility of your pages.

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This video is part of

Image for Web Accessibility Principles
Web Accessibility Principles

68 video lessons · 25938 viewers

Zoe Gillenwater
Author

 
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  1. 2m 0s
    1. Welcome
      1m 3s
    2. Using the exercise files
      57s
  2. 33m 15s
    1. What does accessibility mean?
      5m 51s
    2. How does accessibility help your users?
      3m 30s
    3. Experiencing a website via a screen reader
      5m 46s
    4. How does accessibility help you and your clients?
      3m 9s
    5. Overview of Section 508 standards
      5m 51s
    6. Overview of WCAG standards
      6m 4s
    7. Understanding consistency and semantic markup
      3m 4s
  3. 54m 31s
    1. Understanding screen readers and accessibility tools
      6m 12s
    2. Getting accessible browsers
      5m 41s
    3. Customizing Firefox for accessibility testing
      5m 53s
    4. Using custom accessibility toolbars
      5m 28s
    5. Using Fangs and the Color Contrast Analyzer
      5m 30s
    6. Accessibility tools to bookmark
      5m 53s
    7. Using automated accessibility checking tools
      4m 57s
    8. Setting up the JAWS screen reader on Windows
      6m 42s
    9. Using the VoiceOver screen reader on Mac OS X
      5m 52s
    10. Setting Dreamweaver accessibility preferences
      2m 23s
  4. 26m 12s
    1. Avoiding tables for layout
      3m 30s
    2. Using CSS for layout
      2m 40s
    3. Creating a fixed-width layout
      5m 51s
    4. Creating an elastic layout
      3m 51s
    5. Creating a liquid layout
      3m 4s
    6. Customizing a liquid layout
      7m 16s
  5. 1h 6m
    1. Specifying the language
      3m 43s
    2. Setting page titles
      2m 16s
    3. Setting headings and paragraphs
      9m 55s
    4. Styling headings
      9m 56s
    5. Hiding section headings from sighted users
      6m 41s
    6. Styling text for readability
      6m 41s
    7. Ensuring proper color contrast
      6m 36s
    8. Creating text emphasis
      4m 29s
    9. Indicating quotations
      4m 29s
    10. Creating basic lists
      4m 16s
    11. Styling lists
      7m 15s
  6. 1h 15m
    1. Using lists for navigation
      6m 45s
    2. Creating a horizontal navigation bar
      13m 25s
    3. Creating a vertical navigation bar
      11m 44s
    4. Adding skip navigation links
      12m 0s
    5. Hiding skip navigation links
      6m 17s
    6. Proper link text and title attributes
      6m 11s
    7. Opening new windows
      4m 28s
    8. Accessibility limitations of fly-out menus
      6m 30s
    9. Creating an accessible fly-out menu
      8m 38s
  7. 27m 55s
    1. Proper ALT text for navigation images
      4m 57s
    2. Proper ALT text for decorative images
      5m 19s
    3. Adding ALT text to an existing site
      6m 9s
    4. Adding ALT text to image maps
      5m 58s
    5. Describing complex graphics
      5m 32s
  8. 34m 1s
    1. Using tables for data
      3m 0s
    2. Creating header cells
      4m 5s
    3. Adding table captions and summaries
      9m 9s
    4. Styling tables
      5m 19s
    5. Applying header cells to complex tables
      6m 52s
    6. Adding id and headers attributes
      5m 36s
  9. 42m 7s
    1. Understanding form accessibility issues
      3m 7s
    2. Labeling form fields
      6m 9s
    3. Adding fieldsets and legends
      4m 42s
    4. Moving forms out of tables
      3m 44s
    5. Cleaning up a form's appearance
      4m 53s
    6. Aligning labels and fields using CSS
      9m 39s
    7. Indicating required fields
      6m 15s
    8. Dealing with CAPTCHA
      3m 38s
  10. 7m 29s
    1. The Text-Only technique
      3m 21s
    2. The Access Keys technique
      2m 35s
    3. The Tab Index technique
      1m 33s
  11. 18s
    1. Goodbye
      18s

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