[Libreoffice-ux-advise] [Bug 104052] Add LibreColour HLC palette

https://bugs.documentfoundation.org/show_bug.cgi?id=104052

--- Comment #44 from Christoph Schäfer <christoph-schaefer@gmx.de> ---
(In reply to Tor Lillqvist from comment #43)
> Stuart's comment #35 is very important here (and was something I immediately
> also thought of when doing my awful ugly C++ hack): the way the swatches in
> each palette are displayed should depend on the palette. It is
> counter-productive that every palette is displayed in the same way, as rows
> of 12 swatches. That makes it hard to find colours that are perceptional
> close in palettes based on actual perceptional colour models, like the HLC
> one here. Perhaps we could even have some 3D thing to select colours from a
> palette, where the shape of the arrangement of swatches (blobs?) depends on
> the colour model, as device-independent colour spaces after all are
> three-dimensional. 
>
> (But sure, I doubt anybody is going to fund any work on improving this. And
> distributing palettes as extensions containing just .soc files sure won't
> help.)

Absolutely true, but it becomes awfully difficult when palettes are using Hex
codes only, and named RGB colours aren't really helpful either, aren't they?

With HLC it would be relatively easy, because one could define a grid with each
increment of the Hue value using one or several rows (including empty "cells"
if there aren't enough colours to fill a row). I'm not sure how to achieve this
with a hard-coded rich sRGB palette, though.

As for a 3D display: forget it! People aren't used to this kind of thing, and
LibreOffice doesn't support LAB. It also doesn't have to, because it's an
office suite.

The "genius" (it wasn't my idea) of using HLC instead of LAB, LCH or RGB is
that it's 1) very intuitive and 2) even if you don't understand the underlying
colour model you can still use the simple numbering scheme (000-10-00,
000-20-00 etc.) to find a colour.

Agreed on the use of an extension, too, obviously.

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