There is one byte per LED.
The most significant bit is used for blink/solid:
Off = The LED is lit permanently.
On = The LED blinks.
The three least significant bits are used for color:
1 = not lit
2 = green
3 = yellow
4 = blue
5 = red
0+6+7 not used
The four remaining bits are currently unused and must be 0.
Sources for this description
MIBdepot
Source file: Download INT_GEN.MIB.txt
Source data warning: Recovered from a file whose complete MIB does not parse. The original assignment and definition are preserved. Registration and implementation details may be inaccurate; consult the original file. Other damaged or unresolved declarations are not established registrations.
Source file: Download INT_GEN.MIB.txt
Source file: Download INT_GEN.MIB.txt