man wscons pulls up some interesting kernel options...

options WS_KERNEL_FG=WSCOL_XXX
options WS_KERNEL_BG=WSCOL_XXX
options WS_KERNEL_COLATTR="(WSATTR_XXX | WSATTR_YYY)"
options WS_KERNEL_MONOATTR="(WSATTR_XXX | WSATTR_YYY)"

Given the display on a mac is wscons driven, it'd seem to make sense
that those options should work.  'cording to the man page, WSCOL_XXX is
defined in /usr/include/dev/wscons/wsdisplayvar.h

#define WSCOL_BLACK     0
#define WSCOL_RED       1
#define WSCOL_GREEN     2
#define WSCOL_BROWN     3
#define WSCOL_BLUE      4
#define WSCOL_MAGENTA   5
#define WSCOL_CYAN      6
#define WSCOL_WHITE     7

#define WSATTR_REVERSE  1
#define WSATTR_HILIT    2
#define WSATTR_BLINK    4
#define WSATTR_UNDERLINE 8
#define WSATTR_WSCOLORS 16

We don't wanna muck with the WSATTR lines, but it seems adding the
following to the kernel should do the trick;

options WS_KERNEL_FG=WSCOL_7
options WS_KERNEL_BG=WSCOL_0

It passes a config, so next step is to build and boot...  Given the
slow speed of my box, it'll be a bit before I can verify this
works, but if it does I'll report back with what I find and how to do
it.

Joshua Coombs