ePub "safe" CSS Colours

Agama · 08-22-2011, 07:15 AM

When converting to ePub is there a "safe" set of colors values to use in the CSS which renders without dithering on all eReaders, (perhaps there is a set for 8 greyscale and a different one for 16), or does this depend on the manufacturer?

theducks · 08-22-2011, 07:19 AM

Quote:

Originally Posted by Agama

When converting to ePub is there a "safe" set of colors values to use in the CSS which renders without dithering on all eReaders, (perhaps there is a set for 8 greyscale and a different one for 16), or does this depend on the manufacturer?

Why not use their names? black, red, green,blue... are a few of the many of the 16 valid names allowed.

Agama · 08-22-2011, 07:27 AM

Interesting! I had, (obviously wrongly), assumed that all colors should have equal components of R-G-B since the readers are greyscale, so I have been using values like #999999, #cccccc etc, but noticed that some get dithered, which can look messy on a block of shading.

theducks · 08-22-2011, 07:36 AM

I would expect that some readers would have to dither the color values. Not all readers do 16 levels (only the most modern ones

). Mine does 8 (a reason I picked it over it's slightly bigger brother, that did 4 back then.)

08-22-2011, 07:15 AM	#1
Agama Guru Posts: 776 Karma: 2751519 Join Date: Jul 2010 Location: UK Device: PW2, Nexus7	ePub "safe" CSS Colours When converting to ePub is there a "safe" set of colors values to use in the CSS which renders without dithering on all eReaders, (perhaps there is a set for 8 greyscale and a different one for 16), or does this depend on the manufacturer?

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08-22-2011, 07:27 AM	#3
Agama Guru Posts: 776 Karma: 2751519 Join Date: Jul 2010 Location: UK Device: PW2, Nexus7	Interesting! I had, (obviously wrongly), assumed that all colors should have equal components of R-G-B since the readers are greyscale, so I have been using values like #999999, #cccccc etc, but noticed that some get dithered, which can look messy on a block of shading.

08-22-2011, 07:36 AM	#4
theducks Well trained by Cats Posts: 31,047 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	I would expect that some readers would have to dither the color values. Not all readers do 16 levels (only the most modern ones ). Mine does 8 (a reason I picked it over it's slightly bigger brother, that did 4 back then.)

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