Conditional probability density (Equation (A1)) of the deviation of a single (n_C = 1) apparent color from the intrinsic mean color for a given velocity v for an average dust reddening τ/R_V = 0.1 mag and a range of values of intrinsic color scatter σ_C. Measurement errors have been set to zero. When the average dust reddening dominates (red curve), the apparent distribution is positively skewed. When the intrinsic scatter dominates (blue curve), it is less asymmetric.