When either 16 or 256 color mode is enabled, colors 1-7 are slightly darker.
When 16 and 256 color modes are disable, 8 color mode is used and colors 1-7 are bright(primary) colors.
Blink attribute is Tera Term extension.
When the 16-color mode (aixterm style) is disalbe, SGR100 is "text and background colors set to default".
In Tera Term To extend fore and background 16 color simultaneously, bold attribute is used to extend the fore color and blink attribute is used to extend the background color.
If bold attribute is used to extend the background color, for example, it is not possible to specify a fore color is 15 and background color is 1.
Application outputs according to TERMINFO (e.g. ncurses applications), TERMINFO entry setab as follows:
setab=\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t5;4%p1%{8}%-%d%e48;5;%p1%d%;m,
16 default colors can be changed in TERATERM.INI.
Color themes can also be changed.
TERATERM.INI 16/256 color 8 color
0 "Black" "Black" "Black"
1 "Bright Red" "Red" "Bright Red"
2 "Bright Green" "Green" "Bright Green"
3 "Bright Yellow" "Yellow" "Bright Yellow"
4 "Bright Blue" "Blue" "Bright Blue"
5 "Bright Magenta" "Magenta" "Bright Magenta"
6 "Bright Cyan" "Cyan" "Bright Cyan"
7 "Bright White" "White" "Bright White"
8 "Bright Black (Gray)" "Bright Black (Gray)"
9 "Red" "Bright Red"
10 "Green" "Bright Green"
11 "Yellow" "Bright Yellow"
12 "Blue" "Bright Blue"
13 "Magenta" "Bright Magenta"
14 "Cyan" "Bright Cyan"
15 "White" "Bright White"
Reverse color is displayed in the following cases:
In Tera Term, the fore and back colors are replace to make the display reverse color. (Some terminal emulators use (255-R,255-G,255-B) as (R,G,B) color invert color.)
This is for following reasons: