I had a look in iBooks on my Mac, as well as Kindle Previewer set to e-ink and Fire modes (apparently Amazon removed the ability to preview as iDevice on the grounds that it wasn't quite accurate and now makes you convert and sideload).
One of the minor things that stood out is that the use of differing colours to highlight the different types of measurements in the Sample Worksheet Calculations didn't really show up very well on the simulated PaperWhite (it was all greyscale with noticeable slight but not really standout variations in lightness/darkness), or when using Night/Dark modes on iBooks (no colour highlights at all) or K4Mac/Fire (colour highlights, but the inversion of the regular text/background colours made made the highlighted bits too light to read easily and they faded into the highlight background).
So perhaps rather than highlights, a typographical variant for the text might work better? Perhaps italic underline for front measurements, bold underline for back, and bold italic underline for common, or something similar?
As for the 3-colour images mentioned in the intro, if they're line drawings/diagrams of some sort as I am assuming rather than photos, perhaps a difference in line-style (dotted, dashed) could be substituted for the outlines of the colour portions needed, and perhaps variations in greyscale (very light, very dark) or the use of high-contrast colours which would "convert" to distinct light/dark tones on an e-ink reader for any corresponding colour fills?
Hope this helps.
Last edited by ATDrake; 10-30-2014 at 03:21 PM.
Reason: Drawings are images, but images are not necessarily drawings.
|