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From: Susan M. Dray <sdray@mr.net>
Date: Sun, 7 Dec 1997 20:52:51 -0600
Message-Id: <199712080250.UAA23998@riverside.mr.net>
To: www-style@w3.org
Dear CSS folks,

I am writing to give you my opinion about color notation for as a User
Interface consultant and Human Factors Professional (I am a Fellow of the
Human Factors and Ergonomics Society and a Certified Human Factors

CSS should include HSL.  To use RGB makes _no_ sense from a user's
perspective.  From a UI perspective, a UI that people find difficult to use
is a poor UI.  RGB is a poor UI.  It is hard to learn and hard to use.  RGB
notation is also a poor notation from a usability point of view: when
confronted with a color in RGB notation, it is hard to determine what color
it is, and if you want to encode a color, it is next to impossible to do it
without the use of a tool that does it for you.  

While not perfect, HSL goes a long way to making colors more easily
expressible, while not increasing the work greatly for implementers.  HSL
would help make the Web a more human-oriented place.  Since we are all
increasingly dependent on the Web, this is the right thing to do.

Thank you for noting this perspective.  I hope you will make this change.



Susan M. Dray, Ph.D., CHFP               Phone:  +1 (612) 377-1980
Dray & Associates                        Fax:    +1 (612) 377-0363
2007 Kenwood Parkway                     Email:  sdray@mr.net   OR
Minneapolis, MN  55405  USA                      dray@acm.org
       "If the USERS can't use it, it doesn't work!"
Received on Sunday, 7 December 1997 21:51:06 UTC

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