ruby-****@sourc*****
ruby-****@sourc*****
2013年 4月 12日 (金) 07:56:16 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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@@ -50,14 +50,63 @@
{{br}}
{{image_right("color-codes-s2.png")}}
- The image on the left should give you an idea how to interpret the numbers in the above three categories.
+ The image on the right should give you an idea how to interpret the numbers in the above three categories.
{{br}}
:Possible Value Combinations For All Three Groups Of Defining Colours
-# seeA: ~/work/01-pgmLearn/00allPgmDOC/00-generic-prg-eg:HEX/color-analysis.txt
+ Table:
+ a) DEFINING COLOURS (defined as FF(s)
+
+ Hexadecimal Decimal In Percents
+ -- -- -- --- --- --- ---- ---- ----
+ | a.1) black 00 00 00 0 0 0 0 0 0
+
+ | a.2) red ff 00 00 255 0 0 1 0 0
+ | a.3 green 00 ff 00 0 255 0 0 1 0
+ | a.4 blue 00 ff 00 0 0 255 0 0 1
+ | a.5 yellow ff ff 00 255 255 0 1 1 0
+ | a.6 pink ff 00 ff 255 00 255 1 0 1
+ | a.7 turquoise 00 ff ff 0 255 255 0 1 1
+
+ | a.8 white ff ff ff 255 255 255 1 1 1
+
+ b) DEFINING COLOURS WITH SHADES (defined as FF & 80 in any order.)
+
+ Hexadecimal Decimal In Percents
+ -- -- -- --- --- --- ---- ---- ----
+ | b.1) orange ff 80 00 255 128 0 1 0.5 0
+ | b.2 yellowish-green 80 ff 00 128 255 0 0.5 1 0
+ | b.3 pinkish-blue 80 00 ff 128 0 255 0.5 0 1
+ |
+ | b.4) greenish-yellow ff 80 00 128 255 0 1 0.5 0
+ | o o o
+ | b.15) xyz
+
+
+ c) DEFINING COLOURS COMPOSED ONLY OF SHADES (defined as 80s)
+
+ Hexadecimal Decimal In Percents
+ -- -- -- --- --- --- ---- ---- ----
+ | c.1) brown 80 40 00 128 64 0 0.5 0.25 0
+ | c.2) bluish-pink 80 00 70 128 0 255 0.5 0 0.43
+ | o o o
+
+ d) SPECIAL GROUP
+ Hexadecimal Decimal In Percents
+ -- -- -- --- --- --- ----- ----- -----
+ | a.1) black 00 00 00 0 0 0 0 0 0
+ | d.1) grey 01 01 01 1 1 1 0.004 0.004 0.004
+ | d.2) grey ab ab ab 171 171 171 1.49 1.49 1.49
+ | o o o
+ | d.253) xyz
+ | a.8) white ff ff ff 255 255 255 1 1 1
+
+ # However, these are only the defining colours composed of a limited set of
+ # byte values. If we would count all possible shades, there are over 16.7M
+ # (million) combinations possible.
- (Since colours are listed in ascending order, do not be confused with row "1R" it is repeated for clarity, because it also belongs to a special group where all components have the same value. The smaller the value the darker grey we get, black being the darkest, and on the other side white - the brightest.)
+ (Since colours are listed in ascending order, do not be confused with the rows "a.1" and "a.8" in the last group. They are repeated for clarity, and also because they do belong to this last special group where all components have the same value. The smaller the value the darker grey we get, black being the darkest, and on the other side white - the brightest.)
: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.)