Package: debci

Hi.  I'm filing this against debci becuase that's where I'm seeing it,
and because maybe there is xomething that could be worked around.  but
I think probably the root cause is in munin.

I have anomalous protan, which is a form of colour vision anomaly.

I find it very difficult to see which line is which on, say
  
https://ci.debian.net/munin/static/dynazoom.html?cgiurl_graph=/munin-cgi/munin-cgi-graph&plugin_name=debian.net/ci-master.debian.net/debci_queue_size&size_x=800&size_y=400&start_epoch=1784981699&stop_epoch=1785672899
      

Now, there are lots of lines here and the colours are ever going to be
easy to distinguish.  My usual approach here is to use a tool which
lets me magnify individual pixels and read out their hex values.  This
is tiresome, but it usually works.

However, this approach fails with the graphs on ci.d.n.  I downloaded
an example graph and loaded it into gm display, which has a pixel
magifier.  I selected a pixel whbich is part of one of the vertical
lines in one of the graphs.  (I think most people would call the line
"blue"[1].)

The pixel which is part of the vertical line is coloured #4111a0.

In the key there are number of colour squares; the closest one
is amrhf which is coloured #330099.

You will not that #330099 != #4111a0.  So the two pixels are not the
same colour.  I haven't done the arithmetic with a calculator but I
think #4111a0 is probably a linear combination of #330099 and white.

This is probably due to antialiasing.

The problem could be fixed if antialiasing were turned off, or if
every line was sufficiently wide that its darkest pixel was the same
colour as the key.

There are other approaches to colour vision accessibility of course.
Labelling the lines themselves somehow would help.

Thsnks,
Ian.

[1] One of the effects of anomalous colour vision is
sometimes-justifiable disagreement with other people about what
colour-word ought to be applied to a particular real-world colour.

-- 
Ian Jackson <[email protected]>   These opinions are my own.  

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