Dear, Beastie.
Thanks for the useful info. I successfully change the color.
I'm currently having problem with font upon recompiling kernel. I got the error message as follow:

/usr/src/sys/dev/syscons/syscons.c: In function 'scinit':
/usr/src/sys/dev/syscons/syscons.c:2913: error: 'dflt_font_8' undeclared (first use in this function)
/usr/src/sys/dev/syscons/syscons.c:2913: error: (Each undeclared identifier is reported only once
/usr/src/sys/dev/syscons/syscons.c:2913: error: for each function it appears in.)
/usr/src/sys/dev/syscons/syscons.c:2914: error: 'dflt_font_14' undeclared (first use in this function)
*** Error code 1

I'm using FreeBSD 9.0p4.
Could you give me some comment on this ? Thanks.