I have just sent my '95 M900 off to be sprayed. The colour for mine, Cannondale call 'viper red' is being matched to the
nearest RAL code available off the shelf. I didn't dig about very hard for RAL code info, so I didn't find it. You might try:
http://www.vintagecannondale.com/
or RB forum member '24pouces' might throw some light on it.
If you don't get anywhere & want to know what RAL code was used on mine -and if it's any good-I will let you know. Pm me
Cheers