Reference paper: 

Origlia L., Goldader J.D., Leitherer C., Schaerer D., Oliva E.,
'Evolutionary Synthesis Modeling of Red Supergiant Features 
in the Near-Infrared',
1999, ApJ, 514, 96

Models:

Evoulutionary synthesis models for colors and spectroscopic 
CO features are available both in the case of an instantaneous
burst (file extension: .burst) and for continuous star formation 
(file extension: .constant).
 

colors 
------

files: umb.burst[constant] ==> (U-B) color
       bmv.burst[constant] ==> (B-V) color
       jmk.burst[constant] ==> (J-K) color

format: (1x,1pe9.3,3x,7(2x,0pf6.3))

column #1: age in yr 
column #2: color at Z=0.020
column #3: color at Z=0.008, T_eff=4500, t_red=98%
column #4: color at Z=0.008, T_eff=4000, t_red=98%
column #5: color at Z=0.008, T_eff=3500, t_red=98%
column #6: color at Z=0.008, T_eff=4000, t_red=50%
column #7: color at Z=0.008, T_eff=3500, t_red=10%
column #7: color at Z=0.008, T_eff=3500, t_red=10%

notes: T_eff is the fixed stellar temperature of the stars
             lying in the red part of the HR diagram during 
             the He core burning phase.
       t_red is the fixed time spent in this evolutionary 
             stage.

spectroscopic CO indices:
-------------------------

files: co162v3.burst[constant] ==> CO 1.62, microturbulent velocity = 3 km/s
       co162v5.burst[constant] ==> CO 1.62, microturbulent velocity = 5 km/s
       co229v3.burst[constant] ==> CO 2.29, microturbulent velocity = 3 km/s
       co229v5.burst[constant] ==> CO 2.29, microturbulent velocity = 5 km/s

format: (1x,1pe9.3,3x,14(2x,0pf5.2))

column #1: age in yr
column #2:  index at Z=0.020,  [C/Fe]= 0.0 
column #3:  index at Z=0.008, [C/Fe]= 0.0, T_eff=4500, t_red=98%
column #4:  index at Z=0.008, [C/Fe]= 0.0, T_eff=4000, t_red=98%
column #5:  index at Z=0.008, [C/Fe]= 0.0, T_eff=3500, t_red=98%
column #6:  index at Z=0.008, [C/Fe]= 0.0, T_eff=4000, t_red=50%
column #7:  index at Z=0.008, [C/Fe]= 0.0, T_eff=3500, t_red=10%
column #8:  index at Z=0.020, [C/Fe]=-0.5 
column #9:  index at Z=0.008, [C/Fe]=-0.5, T_eff=4500, t_red=98%
column #10: index at Z=0.008, [C/Fe]=-0.5, T_eff=4000, t_red=98%
column #11: index at Z=0.008, [C/Fe]=-0.5, T_eff=3500, t_red=98%
column #12: index at Z=0.008, [C/Fe]=-0.5, T_eff=4000, t_red=50%
column #13: index at Z=0.008, [C/Fe]=-0.5, T_eff=3500, t_red=10%

notes: T_eff and t_red as indicated above.
       [C/Fe]=0.0 means solar ratio.