尝试定义颜色对，我得到了奇怪的结果。已经定义了所有256种颜色，并尝试使用init_color（）更改任何颜色没有任何影响。
我使用了256色启用的Putty和TERM = xterm-256color（也是putty-256color），使用--enable-widec和--enable-ext-colors编译的ncurses 6.0。这表明所有颜色都已定义，即使成功，init_color（）也不会改变任何颜色：
init_scr();
start_color();
if (has_colors() && COLORS == 256 && can_change_color()) {
NCURSES_COLOR_T f;
for (f = 1; f < 256; f++) {
if (init_pair(f, f, COLOR_BLACK) == ERR) break;
attron(COLOR_PAIR(f));
printw("(%d)", f);
attroff(COLOR_PAIR(f));
refresh();
}
getch();
clear();
for (f = 1; f < 256; f++) {
if (init_color(f, 0, 0, f*3) == ERR) break;
if (init_pair(f, f, COLOR_BLACK) == ERR) break;
attron(COLOR_PAIR(f));
printw("(%d)", f);
attroff(COLOR_PAIR(f));
refresh();
}
getch();
clear();
}
我已经读过默认颜色无法更改，但仅指COLOR_BLACK等（0-7）。
这些256种默认颜色在哪里定义，为什么我无法更改它们？如果它们无法更改，我可以使用定义的颜色，但前提是我可以依赖它们在任何256色终端上都是相同的。
答案 0 :(得分：2)
简短：PuTTY不会这样做，ncurses无法判断PuTTY是否可以......
长：
在ncurses中，init_color函数检查其参数（在给出的示例中，如果$TERM是＆＃34; xterm-256color＆＃34;），那么这些参数看起来没问题，以及检查是否终端说明具有 initc （ initialize_color ）功能。如果缺少或取消，ncurses会返回错误。
但是，这只是终端说明。 ncurses无法判断您是否选择了不正确或不适当的终端描述。
在快速检查中，PuTTY不会对 initc 中使用的控制序列做出响应。这是一个已知的限制，如ncurses提供的（更合适的）终端描述putty-256color所示：
putty-256color|PuTTY 0.58 with xterm 256-colors,
use=xterm+256setaf, use=putty,
xterm+256setaf用于调色板硬编码的终端。 PuTTY并不是唯一同时设置TERM = xterm`并且无法更改其调色板的终端。如果您正在使用旧版本的终端数据库，则可能会被误导，因为该错误已在2014中修复：
# 2014-03-30
# * cancel ccc in putty-256color and konsole-256color for consistency
# with the cancelled initc capability (patch by Sven Zuhlsdorf).
# * add xterm+256setaf building block for various terminals which only
# get the 256-color feature half-implemented -TD
# * updated "st" entry (leaving the 0.1.1 version as "simpleterm") to
# 0.4.1 -TD
#
与开发人员设置TERM=xterm（或TERM=xterm-256color）的其他终端一样，这些终端与xterm之间存在差异。
进一步阅读：
答案 1 :(得分：2)
我发现了一些事情。首先，是的，我显然引用了一个旧的putty-256color terminfo，它有“ccc”，允许can_change_color（）成功，但是init_color（）会失败。但是使用“xterm-256color”的相同Putty窗口会使用init_color（），而color_content（）甚至会显示新值，但屏幕上没有任何变化。令人困惑的是，有时我设置的颜色会出现，而其他时候看似随机的颜色会出现。
这是我发现的：
putty-256color xterm-256color gnome-256color xterm-256color
(putty) (putty) (gnome-terminal) (MobaXterm)
-------------- -------------- ---------------- --------------
change_color OK/ERR OK OK OK
init_color ERR ERR OK OK
color_content ERR OK/NOCH OK OK
color changed? NO NO YES YES
因此，基本上无法确定是否可以更改颜色。但我确实发现每个终端都已经定义了标准的256 xterm颜色，无论它们是否可以更改。所以，现在，我只是使用与xterm调色板中相同的颜色数来定义我想要使用的颜色。这样，无论我是否需要定义它们，我都会看到颜色。因此，要使用“PaleGreen3”，我只需使用：
init_color(77, 372, 843, 372)
如果它有效，它可以工作，如果没有，它可能已经定义了。作为参考，我将所有Xwindow / xterm颜色从GUI十六进制表示法转换为ncurses（0-1000）值：
# Name Tk Ncurses
--- ---------------- ------- -------------
16 Grey0 #000000 0,0,0
17 NavyBlue #00005f 0,0,372
18 DarkBlue #000087 0,0,529
19 Blue3 #0000af 0,0,686
20 Blue3 #0000d7 0,0,843
21 Blue1 #0000ff 0,0,1000
22 DarkGreen #005f00 0,372,0
23 DeepSkyBlue4 #005f5f 0,372,372
24 DeepSkyBlue4 #005f87 0,372,529
25 DeepSkyBlue4 #005faf 0,372,686
26 DodgerBlue3 #005fd7 0,372,843
27 DodgerBlue2 #005fff 0,372,1000
28 Green4 #008700 0,529,0
29 SpringGreen4 #00875f 0,529,372
30 Turquoise4 #008787 0,529,529
31 DeepSkyBlue3 #0087af 0,529,686
32 DeepSkyBlue3 #0087d7 0,529,843
33 DodgerBlue1 #0087ff 0,529,1000
34 Green3 #00af00 0,686,0
35 SpringGreen3 #00af5f 0,686,372
36 DarkCyan #00af87 0,686,529
37 LightSeaGreen #00afaf 0,686,686
38 DeepSkyBlue2 #00afd7 0,686,843
39 DeepSkyBlue1 #00afff 0,686,1000
40 Green3 #00d700 0,843,0
41 SpringGreen3 #00d75f 0,843,372
42 SpringGreen2 #00d787 0,843,529
43 Cyan3 #00d7af 0,843,686
44 DarkTurquoise #00d7d7 0,843,843
45 Turquoise2 #00d7ff 0,843,1000
46 Green1 #00ff00 0,1000,0
47 SpringGreen2 #00ff5f 0,1000,372
48 SpringGreen1 #00ff87 0,1000,529
49 MediumSpringGreen #00ffaf 0,1000,686
50 Cyan2 #00ffd7 0,1000,843
51 Cyan1 #00ffff 0,1000,1000
52 DarkRed #5f0000 372,0,0
53 DeepPink4 #5f005f 372,0,372
54 Purple4 #5f0087 372,0,529
55 Purple4 #5f00af 372,0,686
56 Purple3 #5f00d7 372,0,843
57 BlueViolet #5f00ff 372,0,1000
58 Orange4 #5f5f00 372,372,0
59 Grey37 #5f5f5f 372,372,372
60 MediumPurple4 #5f5f87 372,372,529
61 SlateBlue3 #5f5faf 372,372,686
62 SlateBlue3 #5f5fd7 372,372,843
63 RoyalBlue1 #5f5fff 372,372,1000
64 Chartreuse4 #5f8700 372,529,0
65 DarkSeaGreen4 #5f875f 372,529,372
66 PaleTurquoise4 #5f8787 372,529,529
67 SteelBlue #5f87af 372,529,686
68 SteelBlue3 #5f87d7 372,529,843
69 CornflowerBlue #5f87ff 372,529,1000
70 Chartreuse3 #5faf00 372,686,0
71 DarkSeaGreen4 #5faf5f 372,686,372
72 CadetBlue #5faf87 372,686,529
73 CadetBlue #5fafaf 372,686,686
74 SkyBlue3 #5fafd7 372,686,843
75 SteelBlue1 #5fafff 372,686,1000
76 Chartreuse3 #5fd700 372,843,0
77 PaleGreen3 #5fd75f 372,843,372
78 SeaGreen3 #5fd787 372,843,529
79 Aquamarine3 #5fd7af 372,843,686
80 MediumTurquoise #5fd7d7 372,843,843
81 SteelBlue1 #5fd7ff 372,843,1000
82 Chartreuse2 #5fff00 372,1000,0
83 SeaGreen2 #5fff5f 372,1000,372
84 SeaGreen1 #5fff87 372,1000,529
85 SeaGreen1 #5fffaf 372,1000,686
86 Aquamarine1 #5fffd7 372,1000,843
87 DarkSlateGray2 #5fffff 372,1000,1000
88 DarkRed #870000 529,0,0
89 DeepPink4 #87005f 529,0,372
90 DarkMagenta #870087 529,0,529
91 DarkMagenta #8700af 529,0,686
92 DarkViolet #8700d7 529,0,843
93 Purple #8700ff 529,0,1000
94 Orange4 #875f00 529,372,0
95 LightPink4 #875f5f 529,372,372
96 Plum4 #875f87 529,372,529
97 MediumPurple3 #875faf 529,372,686
98 MediumPurple3 #875fd7 529,372,843
99 SlateBlue1 #875fff 529,372,1000
100 Yellow4 #878700 529,529,0
101 Wheat4 #87875f 529,529,372
102 Grey53 #878787 529,529,529
103 LightSlateGrey #8787af 529,529,686
104 MediumPurple #8787d7 529,529,843
105 LightSlateBlue #8787ff 529,529,1000
106 Yellow4 #87af00 529,686,0
107 DarkOliveGreen3 #87af5f 529,686,372
108 DarkSeaGreen #87af87 529,686,529
109 LightSkyBlue3 #87afaf 529,686,686
110 LightSkyBlue3 #87afd7 529,686,843
111 SkyBlue2 #87afff 529,686,1000
112 Chartreuse2 #87d700 529,843,0
113 DarkOliveGreen3 #87d75f 529,843,372
114 PaleGreen3 #87d787 529,843,529
115 DarkSeaGreen3 #87d7af 529,843,686
116 DarkSlateGray3 #87d7d7 529,843,843
117 SkyBlue1 #87d7ff 529,843,1000
118 Chartreuse1 #87ff00 529,1000,0
119 LightGreen #87ff5f 529,1000,372
120 LightGreen #87ff87 529,1000,529
121 PaleGreen1 #87ffaf 529,1000,686
122 Aquamarine1 #87ffd7 529,1000,843
123 DarkSlateGray1 #87ffff 529,1000,1000
124 Red3 #af0000 686,0,0
125 DeepPink4 #af005f 686,0,372
126 MediumVioletRed #af0087 686,0,529
127 Magenta3 #af00af 686,0,686
128 DarkViolet #af00d7 686,0,843
129 Purple #af00ff 686,0,1000
130 DarkOrange3 #af5f00 686,372,0
131 IndianRed #af5f5f 686,372,372
132 HotPink3 #af5f87 686,372,529
133 MediumOrchid3 #af5faf 686,372,686
134 MediumOrchid #af5fd7 686,372,843
135 MediumPurple2 #af5fff 686,372,1000
136 DarkGoldenrod #af8700 686,529,0
137 LightSalmon3 #af875f 686,529,372
138 RosyBrown #af8787 686,529,529
139 Grey63 #af87af 686,529,686
140 MediumPurple2 #af87d7 686,529,843
141 MediumPurple1 #af87ff 686,529,1000
142 Gold3 #afaf00 686,686,0
143 DarkKhaki #afaf5f 686,686,372
144 NavajoWhite3 #afaf87 686,686,529
145 Grey69 #afafaf 686,686,686
146 LightSteelBlue3 #afafd7 686,686,843
147 LightSteelBlue #afafff 686,686,1000
148 Yellow3 #afd700 686,843,0
149 DarkOliveGreen3 #afd75f 686,843,372
150 DarkSeaGreen3 #afd787 686,843,529
151 DarkSeaGreen2 #afd7af 686,843,686
152 LightCyan3 #afd7d7 686,843,843
153 LightSkyBlue1 #afd7ff 686,843,1000
154 GreenYellow #afff00 686,1000,0
155 DarkOliveGreen2 #afff5f 686,1000,372
156 PaleGreen1 #afff87 686,1000,529
157 DarkSeaGreen2 #afffaf 686,1000,686
158 DarkSeaGreen1 #afffd7 686,1000,843
159 PaleTurquoise1 #afffff 686,1000,1000
160 Red3 #d70000 843,0,0
161 DeepPink3 #d7005f 843,0,372
162 DeepPink3 #d70087 843,0,529
163 Magenta3 #d700af 843,0,686
164 Magenta3 #d700d7 843,0,843
165 Magenta2 #d700ff 843,0,1000
166 DarkOrange3 #d75f00 843,372,0
167 IndianRed #d75f5f 843,372,372
168 HotPink3 #d75f87 843,372,529
169 HotPink2 #d75faf 843,372,686
170 Orchid #d75fd7 843,372,843
171 MediumOrchid1 #d75fff 843,372,1000
172 Orange3 #d78700 843,529,0
173 LightSalmon3 #d7875f 843,529,372
174 LightPink3 #d78787 843,529,529
175 Pink3 #d787af 843,529,686
176 Plum3 #d787d7 843,529,843
177 Violet #d787ff 843,529,1000
178 Gold3 #d7af00 843,686,0
179 LightGoldenrod3 #d7af5f 843,686,372
180 Tan #d7af87 843,686,529
181 MistyRose3 #d7afaf 843,686,686
182 Thistle3 #d7afd7 843,686,843
183 Plum2 #d7afff 843,686,1000
184 Yellow3 #d7d700 843,843,0
185 Khaki3 #d7d75f 843,843,372
186 LightGoldenrod2 #d7d787 843,843,529
187 LightYellow3 #d7d7af 843,843,686
188 Grey84 #d7d7d7 843,843,843
189 LightSteelBlue1 #d7d7ff 843,843,1000
190 Yellow2 #d7ff00 843,1000,0
191 DarkOliveGreen1 #d7ff5f 843,1000,372
192 DarkOliveGreen1 #d7ff87 843,1000,529
193 DarkSeaGreen1 #d7ffaf 843,1000,686
194 Honeydew2 #d7ffd7 843,1000,843
195 LightCyan1 #d7ffff 843,1000,1000
196 Red1 #ff0000 1000,0,0
197 DeepPink2 #ff005f 1000,0,372
198 DeepPink1 #ff0087 1000,0,529
199 DeepPink1 #ff00af 1000,0,686
200 Magenta2 #ff00d7 1000,0,843
201 Magenta1 #ff00ff 1000,0,1000
202 OrangeRed1 #ff5f00 1000,372,0
203 IndianRed1 #ff5f5f 1000,372,372
204 IndianRed1 #ff5f87 1000,372,529
205 HotPink #ff5faf 1000,372,686
206 HotPink #ff5fd7 1000,372,843
207 MediumOrchid1 #ff5fff 1000,372,1000
208 DarkOrange #ff8700 1000,529,0
209 Salmon1 #ff875f 1000,529,372
210 LightCoral #ff8787 1000,529,529
211 PaleVioletRed1 #ff87af 1000,529,686
212 Orchid2 #ff87d7 1000,529,843
213 Orchid1 #ff87ff 1000,529,1000
214 Orange1 #ffaf00 1000,686,0
215 SandyBrown #ffaf5f 1000,686,372
216 LightSalmon1 #ffaf87 1000,686,529
217 LightPink1 #ffafaf 1000,686,686
218 Pink1 #ffafd7 1000,686,843
219 Plum1 #ffafff 1000,686,1000
220 Gold1 #ffd700 1000,843,0
221 LightGoldenrod2 #ffd75f 1000,843,372
222 LightGoldenrod2 #ffd787 1000,843,529
223 NavajoWhite1 #ffd7af 1000,843,686
224 MistyRose1 #ffd7d7 1000,843,843
225 Thistle1 #ffd7ff 1000,843,1000
226 Yellow1 #ffff00 1000,1000,0
227 LightGoldenrod1 #ffff5f 1000,1000,372
228 Khaki1 #ffff87 1000,1000,529
229 Wheat1 #ffffaf 1000,1000,686
230 Cornsilk1 #ffffd7 1000,1000,843
231 Grey100 #ffffff 1000,1000,1000
232 Grey3 #080808 31,31,31
233 Grey7 #121212 70,70,70
234 Grey11 #1c1c1c 109,109,109
235 Grey15 #262626 149,149,149
236 Grey19 #303030 188,188,188
237 Grey23 #3a3a3a 227,227,227
238 Grey27 #444444 266,266,266
239 Grey30 #4e4e4e 305,305,305
240 Grey35 #585858 345,345,345
241 Grey39 #626262 384,384,384
242 Grey42 #6c6c6c 423,423,423
243 Grey46 #767676 462,462,462
244 Grey50 #808080 501,501,501
245 Grey54 #8a8a8a 541,541,541
246 Grey58 #949494 580,580,580
247 Grey62 #9e9e9e 619,619,619
248 Grey66 #a8a8a8 658,658,658
249 Grey70 #b2b2b2 698,698,698
250 Grey74 #bcbcbc 737,737,737
251 Grey78 #c6c6c6 776,776,776
252 Grey82 #d0d0d0 815,815,815
253 Grey85 #dadada 854,854,854
254 Grey89 #e4e4e4 894,894,894
255 Grey93 #eeeeee 933,933,933