#convert logo as needed. I've been experimenting with different sources
convert logo_wintertux.bmp logo_wintertux-16.pgm
sed '1,3d' logo_wintertux-16.pgm > logo_wintertux-16.bin
xxd -c 1 -i logo_wintertux-16.bin > logo_wintertux-16.txt
cp logo_wintertux-16.txt logo_wintertux-16_single.txt
vim combine every other row with one before it using :g/$/j2
xxd -r -p logo_wintertux-16_single.txt > logo_wintertux-16.bin
xxd -c8 -i logo_wintertux-16.bin > logo_wintertux-16-linux_logo.c
cat logo_wintertux-16-linux_logo.c


Color changes:

Colors not in logo: BLUE (1) RED(4) BROWN(6) LBLUE(9) LGREEN(A) LRED(C) LMAGENTA(D)
Change colors:
CYAN(3) -> LRED(C)
LCYAN(B) -> BRWHITE(F)
GREEN(2) -> RED(4)
MAGENTA(5) -> GREEN(2)