The equations for red, green and blue seem to be missing the N (mantissa bits) and should read, for each color component, C,
C = Cs * pow(2, Es - B - N).
[glspec32.core.20090803, section 3.8.17, p. 178.]
Someone was messing with Bugzilla. Fixing fields.
Appears fixed in core 4.3 spec. Closing this bug.