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- Newsgroups: comp.sys.amiga.graphics,comp.graphics.apps.lightwave,comp.sys.sgi.graphics,alt.design.graphics,comp.graphics.apps.alias
- Path: news.sfasu.edu!NewsWatcher!user
- From: fulldog@tag01.acnet.net (Victor Vargas G.)
- Subject: Re: Web Design & Pantone to RGB
- Message-ID: <fulldog-0604960139590001@167.114.251.24>
- Date: Sat, 06 Apr 1996 07:42:51 GMT
- References: <4jsbc9$r79@news1.io.org>
- Organization: NoneYet :^\
-
- In article <4jsbc9$r79@news1.io.org>, gmead@io.org (Glen Mead) wrote:
-
- > Hi All,
- >
- > First of all, with respect to WWW page design, what limitations should I
- > keep in mind (IE. file formats, colours etc) when creating graphics and
- > textures for the web? Also, how does Netscape (and others) handle a web page
- > with 2 16.7 million colour palette JPEG's and a series of 256 colour gif
- > buttons? Does it remap all of them to match a single colour palette of the
- > same depth as the system it's being accesed with? If that is the case, is it
- > best to stick with 256 colour (or less) gifs all with the same palette
- to make
- > graphics more efficient? I've seen a web page (designed by a friend) in
- which
- > the individual images look spectacular but once on the page together, they
- > look grainy.
-
- First off, remember that most users are connecting at 14.400 with dialup
- providers, so pages full of big grafx over a highly detailed multicolor
- pattern that takes forever to load are likely to be avoided, no matter how
- cool design is... GIF is the standard of course, and its limitation to 256
- colors makes it suitable for logos, buttons and graphic elements that use
- little color variety, but still is wise to reduce its palette as much as
- possible, i.e. if your logo is just 4 colors, you can get away with a
- 16-color gif (allowing some extra colors for antialiasing). If you need to
- show complex grafx (3D renders, realistic textures with gradiations,
- photographs) you'll likely need to use JPEGs, which are >way< smaller but
- have to be uncompressed by the user's machine, and this may slow down
- display if it is a wimpy CPU...
- Remaping: indeed all grafx on a page are mapped to the screen mode of the
- user's machine, so if he/she has a Mac with a 24bit display all grafx will
- look beautiful, but someone using just 8-bit (256 cols.) on a Mac or
- Windoze will have see a lot of dithering. In fact grafx can vary widely
- when displayed on the same machine if using different browsers, so
- checking your page on as many systems/browsers as possible is your best
- bet for avoiding nasty surprises if you need truly accurate designs...
-
- > Second, are there any programs (either stand alone or as features within
- > another program)or tables to convert Pantone colours to RGB? At work I tried
- > selecting a Pantone colour in CorelDraw 4.0 as a fill colour, then I changed
- > from the Pantone palette to an RGB palette and recorded the RGB values.
- Then,
- > I took the colour values over to our SGI and the resulting colour was nothing
- > like the colour I was looking for.
-
- So your client wants to see his great logo on a RGB screen with its
- Pantone colors exactly matching those of the glossy printed brochure he
- mails, right? Well, its just about impossible to match >reflected<
- (printed) colors to those >emanating< from a RGB monitor, the best you can
- get is approximations, and if to that you add that everybody has a
- different gamma on his monitor, well... I use Photoshop and Illustrator's
- Pantone video simulation features (via Macintosh ShapeShifter emulation on
- my A4000) for >approximating< Pantone swatches in RGB, and believe me,
- you'll go blind if you try to match pixels and paper...
-
- --
- Victor Vargas G. ÇAmiga 3D animation & video graphics/Mac DTPÇ
-
-