As of 1.8.2 note block colors are incorrect.
Steps:
Place a note block
"Use" the note block repeatedly to cycle through the colors
Actual:
Colors are incorrect
Expected:
Colors should reflect those seen here:
http://minecraft.gamepedia.com/Note_Block#Usage
Environment
windows 7, intel 15, gforce gtx 680, 16 gb ram, java 1.8.0_25 64bit
Duplicates MC-80658