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The Colours panel allows you to control PuTTY's use of colour.
4.13.1 ‘Allow terminal to specify ANSI colours’This option is enabled by default. If it is disabled, PuTTY will ignore any control sequences sent by the server to request coloured text.
If you have a particularly garish application, you might want to turn this option off and make PuTTY only use the default foreground and background colours.
4.13.2 ‘Allow terminal to use xterm 256-colour mode’This option is enabled by default. If it is disabled, PuTTY will ignore any control sequences sent by the server which use the extended 256-colour mode supported by recent versions of xterm.
If you have an application which is supposed to use 256-colour mode and it isn't working, you may find you need to tell your server that your terminal supports 256 colours. On Unix, you do this by ensuring that the setting of TERM describes a 256-colour-capable terminal. You can check this using a command such as infocmp:
$ infocmp | grep colors colors#256, cols#80, it#8, lines#24, pairs#256,If you do not see ‘colors#256’ in the output, you may need to change your terminal setting. On modern Linux machines, you could try ‘xterm-256color’.
4.13.3 ‘Allow terminal to use 24-bit colour’This option is enabled by default. If it is disabled, PuTTY will ignore any control sequences sent by the server which use the control sequences supported by modern terminals to specify arbitrary 24-bit RGB colour value.
4.13.4 ‘Indicate bolded text by changing...’When the server sends a control sequence indicating that some text should be displayed in bold, PuTTY can handle this in several ways. It can either change the font for a bold version, or use the same font in a brighter colour, or it can do both (brighten the colour and embolden the font). This control lets you choose which.
By default bold is indicated by colour, so non-bold text is displayed in light grey and bold text is displayed in bright white (and similarly in other colours). If you change the setting to ‘The font’ box, bold and non-bold text will be displayed in the same colour, and instead the font will change to indicate the difference. If you select ‘Both’, the font and the colour will both change.
Some applications rely on ‘bold black’ being distinguishable from a black background; if you choose ‘The font’, their text may become invisible.
4.13.5 ‘Attempt to use logical palettes’Logical palettes are a mechanism by which a Windows application running on an 8-bit colour display can select precisely the colours it wants instead of going with the Windows standard defaults.
If you are not getting the colours you ask for on an 8-bit display, you can try enabling this option. However, be warned that it's never worked very well.
4.13.6 ‘Use system colours’Enabling this option will cause PuTTY to ignore the configured colours for ‘Default Background/Foreground’ and ‘Cursor Colour/Text’ (see section 4.13.7), instead going with the system-wide defaults.
Note that non-bold and bold text will be the same colour if this option is enabled. You might want to change to indicating bold text by font changes (see section 4.13.4).
4.13.7 Adjusting the colours in the terminal windowThe main colour control allows you to specify exactly what colours things should be displayed in. To modify one of the PuTTY colours, use the list box to select which colour you want to modify. The RGB values for that colour will appear on the right-hand side of the list box. Now, if you press the ‘Modify’ button, you will be presented with a colour selector, in which you can choose a new colour to go in place of the old one. (You may also edit the RGB values directly in the edit boxes, if you wish; each value is an integer from 0 to 255.)
PuTTY allows you to set the cursor colour, the default foreground and background, and the precise shades of all the ANSI configurable colours (black, red, green, yellow, blue, magenta, cyan, and white). You can also modify the precise shades used for the bold versions of these colours; these are used to display bold text if you have chosen to indicate that by colour (see section 4.13.4), and can also be used if the server asks specifically to use them. (Note that ‘Default Bold Background’ is not the background colour used for bold text; it is only used if the server specifically asks for a bold background.)
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