Libra Libra Color not always seems to present the required colors

[DrChiper]

Well, no need for apologizing. I did not expressed clearly what I was doing, to begin with.
In short: The intention was to make "known" colors appear on the KLC and investigate how they looked on the real KLC display.
That to choose the right blue color to make the document links stand out as they are hardly noticeable. (and you must encode them otherwise they are by default black, which was another finding)

So I hacked a quick and dirty HTML-page to display several most used and known colors by their "official" names to make it reproducible. In real life I use color-codes and names where and when it suits me best.
So my finding was that one of the "official" color names was not recognized by the KLC. And that goes for EPUB and KEPUB.

My other finding is that the real rendering on the KLC screen is lacking distinction as most blue (darker) colors for instance look very the same. But that was expected (there is a reason why I choose actually the TLC Nxtpaper 11 for my colored documents )

[Quoth]

Originally Posted by DrChiper

My other finding is that the real rendering on the KLC screen is lacking distinction as most blue (darker) colors for instance look very the same. But that was expected (there is a reason why I choose actually the TLC Nxtpaper 11 for my colored documents )

Totally predictable.
1. Only 14 grey levels between black and white.
2. Printed R G B dots deliberately don't cover pixels so as to make it not so dark as Triton, and not pastel dots (because no doubt it's standard filter print ink), and the "not covering the pixel" allows them to weasel that it can do 300 dpi mono (nut not like a real 300 dpi mono, a misleading claim by almost all Kaleido screen based ereaders).

So both less saturated pale shades and less saturated dark shades can only be very poor. Inherent to using a mono eink panel and attempt to have it brighter and almost 300 dpi for mono by using dots that don't cover pixels.

I might get one S/H at €50 eventually out of curiosity. I'd like a Nxtpaper 14 or Nxtpaper 14 pro, but they seem unobtainable.

[DrChiper]

Well, Kobo themselves seem not believe in their colors either. Because, hey, this is a Color ereader, but where are the colors? Besides the startup screen, home-screen and selected icons coloration (bottom homepage) NOWHERE is colorization actually used. The whole ereader experience should sparkle with color usage, but now it is just as any B&W ereader. At least for instance the statistics screen could make use of color. But no, its the user who must provide the colors by uploading according color EPUBs. And it seems that they even must update these sometimes to get those colors really shown.

[Calenorn]

Originally Posted by DrChiper

The whole ereader experience should sparkle with color usage...

Oh, be careful what you wish for. Just imagine color everywhere. Imagine how some would gripe about that. Imagine the demands customization options.

Whew! It's a bag of worms.

[DrChiper]

Originally Posted by Calenorn

Just imagine color everywhere.

Well, I'm living in a colorful world. And I hope you too. GUI usage dictates the user is in control and can adjust it to his liking, as far it is technically permittable. Claiming color implies providing means to control it.

[Calenorn]

Originally Posted by DrChiper

Claiming color implies providing means to control it.

That would be very nice. But I don't think the current Kobo software allows that kind of control. Maybe it does; I don't have one yet.

[Cootey]

Originally Posted by DrChiper

Well, Kobo themselves seem not believe in their colors either. Because, hey, this is a Color ereader, but where are the colors? Besides the startup screen, home-screen and selected icons coloration (bottom homepage) NOWHERE is colorization actually used. The whole ereader experience should sparkle with color usage, but now it is just as any B&W ereader. At least for instance the statistics screen could make use of color. But no, its the user who must provide the colors by uploading according color EPUBs. And it seems that they even must update these sometimes to get those colors really shown.

The boot screen has colored leaves, though I can’t say it’s a stunning use of color. The reader menu in a book shows the color of the pen. The selected tab at the bottom is usually colored red, and the tabs in My Books are also colored red. Corporate icons in More have colors. WHY, IT’S A VERITABLE SMORGASBORD OF COLORS EVERYWHERE LIKE DAUBS OF…no, you’re right. For a color ereader, Kobo’s UI color usage is so restrained as to be invisible. It seems an odd design choice for something they’re marketing as the hottest new thing.

It’s possible that they didn’t want the UI to compete with all those lovely color book covers.

[Bald Eagle]

Made a photo of the color table on my LC.

[JSWolf]

Originally Posted by Bald Eagle

Made a photo of the color table on my LC.

That color chart looks awful. I prefer my Libra 2 for it's lack of color.

[Quoth]

Mostly a GUI shouldn't use colour. But omitting all shades of grey as seems popular in newer GUIs on Android, Windows and Linux is mad. You then can't easily see what to tap on, if things are on/off or selected/deselected, or which is active tab. You need black, white, and 3 shades of grey minimum. Five shades out of the possible 14 is fine.

Colour could be used for active labels (except eink only does dim pastel colours) and dark grey for inactive (assuming a proper non-dark theme).

[Quoth]

Originally Posted by Bald Eagle

Made a photo of the color table on my LC.

And here is a photo via an ancient Alcatel phone of the same HTML in an epub displayed by Okular on an LG 23″ 4K screen, brightness 9, contrast 32


I'll do the same in Pocketbook app on the TCL Nxtpaper 11 next.

The screen isn't as matt as the Nxtpaper 2.0, but better than anything in the Apple showroom. You can see the room light reflection on the screen bezel, but not on the screen.

Nearly as good as eink for mono on glare/shine and viewing angle and clarity.

It's sharper and better colour in real life!

[Quoth]

Here is Pocketbook App (epub copied by opds from Calibre Content Server) with the test epub on a TCL Nxtpaper 11 badly angled under the room light.
The phone sees more reflection than humans.
Same ancient Alcatel phone on automatic.

TCL Nxtpaper 11 (Nxtpaper 2.0 screen) is at 22% brightness.
(It's fine in full sunlight too).

It's also very much sharper and better colour in real life with no apparent glare.

[Quoth]

Originally Posted by Quoth

Here is Pocketbook App (epub copied by opds from Calibre Content Server) with the test epub on a TCL Nxtpaper 11 badly angled under the room light.
The phone sees more reflection than humans.
Same ancient Alcatel phone on automatic.
Attachment 208887
TCL Nxtpaper 11 (Nxtpaper 2.0 screen) is at 22% brightness.
(It's fine in full sunlight too).

It's also very much sharper and better colour in real life with no apparent glare.

Here it is at same settings, without being almost directly under room light.

Again the old Alcatel phone doesn't do sharpness and colour justice.

The paler shades have more colour and the darker shades more differences in real life.

I suppose I could use a better camera.