Warm should be utilized in the flowering phase since it has a higher portion of far red wavelength.
During vegetative growth, red/blue/yellow should be employed as they are closest to the full spectrum.
Or, you might use red/blue for early vegetative growth and red/blue/yellow for the rest of vegetative growth, particularly in the transition stage right before you switch your light from 18/6 to 12/12 for the flowering phase.
MORE: How Do Different Spectra Affect Plant Growth?