Call for testing: colorblindness vs side-by-side diff
David Champion
dgc at uchicago.edu
Mon Jul 23 16:50:41 UTC 2012
> As for the specific colors currently in use, I personally can see the
> difference between all of the colors just fine when they are
> side-by-side. I may have a *slight* difficulty distinguishing between
> "inserted" and "replaced" when not viewed side-by-side with each other
> (e.g. if there is only one visible change on the page I would need to
> pause for a second or two to determine whether something was inserted
> or replaced), but as Tony points out the simple fact that "inserted"
> text has text only on one side whereas "replaced" text has text on
> both sides helps with that. I think the only real time I might need
> the color cues to differ between change types would be for changes
> which are very close together, so this should be very usable.
I replied to Matt previously and privately, but I think this is a very
good point and explains where I was coming from in suggesting a little
more differentiation. I can distinguish them all pretty well together.
The yellow and green are distinct enough side by side, but either one
alone, absent the other and absent any other cues, would me rather more
difficult to identify as "yellow" or "green", depending on what kind of
display I'm using (and at what angle, if LCD).
The red may not look like "red" to me but it is distinctly not "yellow"
or "green", so it works as-is.
We may be quite alright already, but would it improve
things for anyone to use a foreground color as well? E.g.
http://home.bikeshed.us/dgc/hg/discover.html
--
David Champion • dgc at uchicago.edu • IT Services • University of Chicago
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