ruby-****@sourc*****
ruby-****@sourc*****
2013年 4月 13日 (土) 05:59:29 JST
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REMOTE_ADDR = 184.145.81.37
REMOTE_HOST =
URL = http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-gtk2-appdx-clrtheory
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@@ -114,6 +114,14 @@
:Note
In the above table, we consistently use FF and 80 rather than FA and 7F (even when this is incorrect - i.e. the darkest orange or brown colours should have codes "ff fa 00" and "fa 7f 00" rather than "ff ff 00" and "ff 80 00", respectively) because they are easier to distinguish for human reader (easier for eyes), and the error (overlap) is tolerable. (FF, 80 only cause the overlap at the colour brake, which for human eye is unrecognizable, anyway.)
+
+ :The Group (c) Composed Of Shades Only Deserves Extra Attention
+
+ This group is special in many respects, but the most important distinction from the other groups above is, that only one code in this group is used to define a single ((*defining colour*)), that maps to the basic natural colours all people who are not "colour-blind" can identify, namely, the((*brown (804000)*)) colour. It gets even more confusing if you wish to define different shades of brown, particularly on the darker side of the spectrum, because the red component of brown can go all the way up to xFF.
+
+ All that was just said is also true for all other possible (digital) colours from the group (c) in above table. For instance dark-turquoise or, as some call it, dark-cyan colour (004080), which for most people is not another colour all together, is actually just a darker version of regular 'turquoise' (00ffff). This, really is not unlike brown which is actually a very dark shade of orange, which in turn is the yellow shade of red. The difference is that, ((*brown*)) for most humans is a distinct colour, just like the orange, but unlike, for instance, a "seagreen" or "stealblue" which are considered shaded "green" or "blue", perhaps even in any order!?
+
+
You should also notice that, while some colours for human eye are very hard to correctly identify, digitally they can be defined with absolute certainty, which may have some significance for a scientist but is rather useless for an artist or an art lover.
Also note that the groups (1), (6) and (7) are a special case that actually create a very distinct "non-colour" (black and white) group. On top of that, groups (1) "white" and (7) "black" mark the beginning and end of the digital spectrum, which for human eye translates into a characteristic called brightness, that runs from the darkest colour to the brightest one.