BCcodes computes bolometric corrections and synthetic colors in up to 5 filters for input values of the stellar parameters Teff, log(g), [Fe/H], E(B-V) and [alpha/Fe].
https://ui.adsabs.harvard.edu/abs/2014MNRAS.444..392C and/or https://ui.adsabs.harvard.edu/abs/2018MNRAS.475.5023C