Table 1: The color-metallicity relations for 10 different colors.
Color N Relation
V-I 65 [Fe/H] = -5.79 + 4.68 (V-I)
U-B 72 [Fe/H] = -1.91 + 3.22 (U-I)
B-V 78 [Fe/H] = -4.83 + 4.91 (B-V)
V-R 55 [Fe/H] = -5.93 + 9.82 (V-R)
U-V 72 [Fe/H] = -3.15 + 2.05 (U-V)
B-R 55 [Fe/H] = -5.49 + 3.58 (B-R)
B-I 65 [Fe/H] = -5.87 + 2.75 (B-I)
U-R 55 [Fe/H] = -3.61 + 1.71 (U-R)
U-I 64 [Fe/H] = -4.19 + 1.57 (U-I)
R-I 54 [Fe/H] = -4.41 + 6.39 (R-I)


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