Yes blue will work, but red is whats called for you to use. Also are you tightening them properly?
When i say properly i mean you install the inside nut hand tight up to the sprocket hub, then with a torque wrench, tighten that inside nut too 40ftlbs.
Next install the outer nut and hand tighten it against the inside nut. Now hold the inside nut with a wrench and tighten the outside nut too 140ftlbs.
NOW, hold the outside nut with a wrench and turn the inside nut backwards into the outside nut and torque that inside nut backwards into the outside nut too 177ftlbs,
That's the proper way to do this as it Locks the nuts together and they will NOT come loose.
If your just tightening the inside nut just enough so the axle turns then your tightening the hell outta the outside nut too the inside nut it will always come loose cause your nut "locking" them together and thats what your doing correct?
:beer: