grub: color_normal
15.1.6 color_normal
-------------------
This variable contains the "normal" foreground and background terminal
colors, separated by a slash ('/'). Setting this variable changes those
colors. Each color must be a name from the following list:
* black
* blue
* green
* cyan
* red
* magenta
* brown
* light-gray
* dark-gray
* light-blue
* light-green
* light-cyan
* light-red
* light-magenta
* yellow
* white
The default is 'light-gray/black'.
The color support support varies from terminal to terminal.
'morse' has no color support at all.
'mda_text' color support is limited to highlighting by black/white
reversal.
'console' on ARC, EMU and IEEE1275, 'serial_*' and 'spkmodem' are
governed by terminfo and support only 8 colors if in modes 'vt100-color'
(default for console on emu), 'arc' (default for console on ARC),
'ieee1275' (default for console on IEEE1275). When in mode 'vt100' then
the color support is limited to highlighting by black/white reversal.
When in mode 'dumb' there is no color support.
When console supports no colors this setting is ignored. When
console supports 8 colors, then the colors from the second half of the
previous list are mapped to the matching colors of first half.
'console' on EFI and BIOS and 'vga_text' support all 16 colors.
'gfxterm' supports all 16 colors and would be theoretically
extendable to support whole rgb24 palette but currently there is no
compelling reason to go beyond the current 16 colors.
Info Catalog
grub: color_highlight
grub: Special environment variables
grub: config_directory