On Sunday 03 December 2006 05:25, Anne Wilson wrote: >On Saturday 02 December 2006 23:32, Matthew Miller wrote: >> On Sun, Dec 03, 2006 at 08:12:34AM +1100, Cameron Simpson wrote: >> > On 02Dec2006 19:38, anne wilson <cannewilson@xxxxxxxxxxxxx> wrote: >> > | I panicked when I got an unexpected screen, thinking that I had >> > | actually accessed something else altogether. Naturally, then, I >> > | didn't think of info, since it would tell me about the 'other' - >> > | OK - it might have answered question 1. As it turns out, it >> > | wouldn't have helped much, as it simply returns [... a useless >> > | menu...] >> > >> > Info's usually annoying. Always start with "man units". >> >> or use "pinfo" instead of regular info, unless you are an emacs >> junkie. > >Which brings me to a related problem. When getting a colour listing in > a terminal I find the blue on black almost impossible to read. I'm > sure there must be a way to lighten the blue, but my poking around so > far hasn't found it. Any ideas? > >Anne Basicly, that's a human eye problem, Anne. Blue is only 11% as bright for the same energy in as white. Green is 59%, and red as we get it out of crt phosphers is not only shifted toward the orange to make it brighter but is still only in the 30's someplace then. For those with some color blindness, blue is often very poorly seen. Even for those with excellent color vision like me, its still a poor choice in terms of readability. Interestingly there was an article in one of the sci journals about a year ago that discussed bird vision, and it conjectured that at one point, their dinosaur inherited eyes were much wider bandwidth than our eyes today, with an additional 4th sensitivity peak reaching well into the ultraviolet, effectively giving them 4 color vision. This is still true of the birds considered more primitive today in fact. These same birds have dyes in their feather coloration that make them highly visible to a potential mate whose 4 color vision can see them quite well, but much less so for the average predators more limited eyes, many of whom we mistakenly assume to be color blind. They are not, anymore than our color-blind people are as they, like us do see two colors, a dim blue bandwidth and the much more visible green-orange peak. It was a very interesting read. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Yahoo.com and AOL/TW attorneys please note, additions to the above message by Gene Heskett are: Copyright 2006 by Maurice Eugene Heskett, all rights reserved.
