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From "Matt Foley (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-5266) Red / green colorblind problem with service status dashboard, etc.
Date Fri, 28 Mar 2014 18:57:16 GMT
Matt Foley created AMBARI-5266:
----------------------------------

             Summary: Red / green colorblind problem with service status dashboard, etc.
                 Key: AMBARI-5266
                 URL: https://issues.apache.org/jira/browse/AMBARI-5266
             Project: Ambari
          Issue Type: Improvement
          Components: client
    Affects Versions: 1.5.0
            Reporter: Matt Foley


The following request was made by a colleague who did not wish to publicize his colorblindness:

"I am green colorblind and the red/green service status dots look identical to me (especially
on my Dell monitor, laptop is a little better though). I am sure that other people are affected
by this as well.  This may seem like a trivial request, but actually is quite inconvenient
because to see service statuses, I now have to go down the list and click on each service
individually."

Evidently the particular shades of red and green currently used have very similar luminosity.
 

Solutions are readily available in the Accessibility literature, including
* changing palette to use red/green with significantly contrasting luminosity (This is a quick-fix,
especially if the colors are palettized.)
* adding text cue along with the color indicator
* using a left/right or other non-color graphical cue along with the color
* etc.

A useful website for understanding the problem in the context of web pages is:
* http://msdn.microsoft.com/en-us/library/bb263953(v=vs.85).aspx

Please consider at least adapting the palette in the next release.  Thanks.



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