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Re: Your help needed to make the Web more usable

From: Dr. Manuel Rodriguez Perazza <ieee@exodo.upr.clu.edu>
Date: Fri, 5 Dec 1997 07:20:17 --400
Message-Id: <v01520d1ab0ad5b1a9748@[]>
To: "Manuel A. Perez" <mperez@exodo.upr.clu.edu>
Cc: www-style@w3.org
I agree fully with your proposal.  It makes sense.  Although standarization
requires to hold the obsolete in operation for some time, something
understandable by the human brain is always better than meaningless code.


>Here is a note I received.  If this interests you at all, please do send a
>note to the email address included in the message.
>>(Summary: By sending an email to www-style@w3.org, you can help
>>persuade the CSS group to include a more human-oriented notation for
>>colours than the RGB #FFFFFF style.)

>>You can see the whole proposal at
>>http://www.cwi.nl/~steven/css/hsl.html, with examples of colours and
>>their encodings, but in a nutshell, HSL looks like this:
>>    * HSL encoded colours consist of three numbers: Hue, Saturation, and
>>    Lightness.
>>    * Hue is an angle from 0 to 360 degrees. It represents a colour from
>>    the colour circle, with red=0 (=360 degrees), green=120 degrees,
>>    blue=240 degrees. So for instance, since magenta is halfway between red
>>    and blue, it is 300 degrees.
>>    * Saturation is 100% for a pure colour, down to 0% for a shade of grey
>>    (completely unsaturated).
>>    * Lightness goes from 0% for no lightness (i.e. black), to 100% for
>>    full lightness (white), with 50% being the 'normal' value for a
>>    colour.
>>So for instance,
>>        hsl(0,  100, 50) is red;
>>        hsl(0,  100, 25) is dark red,
>>        hsl(0,   50, 50) is a pastel red,
>>        hsl(0,   50, 25) is a dark pastel red, and
>>        hsl(240, 50, 25) is a dark pastel blue.
>>For the reasons mentioned above, the CSS committee have decided not to
>>include HSL colour specification, but have minuted that they will
>>publish the fact that it is an option, and if enough people ask for
>>it, it will be put in.
>>This is why I am writing. If you think that CSS should include HSL
>>(and note that this is now the only option: it is not possible to
>>propose another solution), you should send an email to
>>www-style@w3.org, giving your opinion about what you think of RGB, and
>>why you think that HSL would help make the Web a more human-oriented
>>Steven Pemberton, CWI, Amsterdam; Steven.Pemberton@cwi.nl

IEEE Region 9 Chair of Student Activities Committee          RSAC9
Dr. Manuel Rodriguez Perazza                    Tel (787)265-3897
Depto. Ing. Electrica y de Computadoras         Fax (787)831-7564
Universidad de Puerto Rico                      ieee@exodo.upr.clu.edu
Mayaguez, Puerto Rico 00681-5000, USA
Received on Friday, 5 December 1997 06:21:38 UTC

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