One aspect of colour tone is white balance (or colour temperature) selection.
Camera electronic flash colour temperature is typically 5,400 to 5,600 Kelvin. Fluorescent colour temperature ranges from 3,200 Kelvin (warm white) to 5,200 Kelvin (daylight white) to 6,500 Kelvin (cool white) to 8,800 Kelvin.
Selecting a colour temperature higher than actual colour temperature, results in a warmer (or more yellowish) colour tone. Selecting a colour temperature lower than actual colour temperature, results in a cooler (or more bluish) colour tone.