Table 5: Theoretical colours of M- and C-stars of solar metallicity. For some models, the second line indicates the colours when the star is obscured by circumstellar dust equivalent to a dimming in K by 0.05 mag.

SpT		(I-J)	(J-K)
M 0	3850	1.18	1.08
M 3	3550	1.39	1.18
M 3 + dust	3550	1.53	1.34
M 5	3397	1.86	1.27
M 7	3129	3.11	1.37
M 7 + dust	3129	3.73	1.97
M 8	2890	3.71	1.37
M 10	2500	4.13	1.35
M 10 + dust	2500	4.45	1.74
C	3600	1.43	1.17
C	3400	1.56	1.30
C	3200	1.72	1.43
C	2800	2.00	1.61
C	2650	2.09	1.61
C + dust	2650	2.48	2.09