Make sure there are exactly 16 colour values, (a number from 0 to 255 if you forgot) separated by a comma.
Try this and go from there:
NAME = Blue
RAMP = 146,147,148,149,150,151,152,153,154,155,156,157,158,159,253,254
INVCOLOR = 32
INVSHADE = 5
CHATCOLOR = 16384
ACCESSIBLE = TRUE
This code...