Hi Miss,
this is done very easily by changing three values in 'menu_1024_768.ini'. At first backup this file then open it in notepad [or any text editor] and look for these three blocks below. Change the three
values and the numbers beneath the gauges will appear in innocent white.
So long,

SSB
[G3F I42]
<---- may differ if your 'menu_1024_768.ini' is modded !!
Name=Meters val
Type=1029;Static text
ItemID=0x3F010013
ParentID=0x3F010000
Pos=230,-112,28,20
Color=
0xFFFFFFFF; old value for red 0xD26400FE
Font=4
Text=955
TextFlags=0x6
-----------------------------------------------------------
[G3F I45]
<---- may differ if your 'menu_1024_768.ini' is modded !!
Name=Degrees
Type=1029;Static text
ItemID=0x3F010015
ParentID=0x3F010000
Pos=123,-112,32,20
Color=
0xFFFFFFFF; old value for red 0xD26400FE
Font=4
Text=955
TextFlags=0x6
-----------------------------------------------------------
[G3F I46]
<---- may differ if your 'menu_1024_768.ini' is modded !!
Name=Knots val
Type=1029;Static text
ItemID=0x3F010014
ParentID=0x3F010000
Pos=25,-112,28,20
Color=
0xFFFFFFFF; old value for red 0xD26400FE
Font=4
Text=955
TextFlags=0x6
P.s.: you can fiddle about these values to get different colors