https://bugs.documentfoundation.org/show_bug.cgi?id=104052
--- Comment #42 from Christoph Schäfer <christoph-schae...@gmx.de> ---
For those who don't know what cross-media publishing means and why the
integrity of the palette is so important:
If you want to publish across all available media, there are two ways you can
do it:
1) traditionally with the best results but time-consuming and expensive;
2) in a streamlined cross-media workflow with a little loss of quality, but
also at much lower costs and little to no discrepancies in the display of
colours.
Option 1) means for images to be kept in a large colour space like ECI RGB and
then manually adjusted for specific output targets like Web, CMYK print,
digital print etc. Fill colours, especially for logos can be spot colours (and
often are), which offer a wider gamut than can be achieved by CMYK printing or
web colours. Spot colours require an extra printing plate per colour, which
makes printing very expensive. There will also be huge discrepancies between
professionally printed fliers, brochures etc., the print result on deskjet
printers, presentations and the web.
With option 2) some brilliance in print and high-definition display systems is
being sacrificed to save costs and to minimise the discrepancies between
allegedly identical colours in different media. For that purpose the colour
gamut is limited to sRGB. Instead of adjusting colours images for each output
target, they are simply kept in the sRGB colour space, the only necessary
editing being up or downscaling (e.g. for print or web), which can be
automated. For fill colours, this means not only reducing the available colours
to sRGB but a further reduction to a subset that can be reliably reproduced in
CMYK. This doesn't only reduce the time consumed by graphics professionals and
hence the related fees, but also the printing expenses (no spot colours
involved). Moreover, colour discrepancies between different media and printing
methods are negligible. Colours will always be *very* similar.
For an office suite like LibreOffice this means that once a "corporate" colour
identity has been developed using the "safe" HLC palette and the fF fans,
non-designers can use these colours safely for all kinds of colour-related
work, including letterheads or presentations. They don't even need the fans
(only graphics professionals do).
If it's possible to save local copies of the hard-coded palette, a company,
non-profit organisation, whatever could also provide a stripped-down version of
the HLC palette to its employees with only a subset of colours allowed for
colour communication.
It took freieFarbe e.V. and its predecessors a lot of time, money and testing
in real-world scenarios to create the free fans and the palette, but it was
worth it, I believe, because it "just works".
HTH
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