Selection of tooth colour is the least defined by rules. Usually, therapists simplify the colour selection and limit themselves to only few shades. Teeth are usually white colour, but shades of white may vary and create significant influence on the smile impression. Therefore, entire perception of colour of a single tooth depends not only on mixing shades of dentin and enamel, but other optical characteristics between these dental tissues too. Skin colour and usage of lip – stick or lip – gloss also has influence on the tooth colour. Tooth colour also depends on ambient light and individual perception of colour by the observer. Considering all, it’s obvious that selection of tooth colour is subjective procedure, and because of that mistakes are common. Because of that, company invented devices whose aims are to determine colour objectively. Today, we have two methods for selecting tooth colour: visual and digital. Visual method considers colour selection in daylight and the colour itself is determined by shade guide from different manufactures. Besides of visual method, we can also use digital devices to select tooth colour. Digital methods are based on spectrophotometric or colorimetric method. Digital devices use software programs to process received data and draw maps of tooth surface with shades that suit them. Both methods, visual and digital, have advantages and disadvantages and because of that it would be ideal to use both methods to select correct tooth colour. As result of that, possibility of mistakes would be minimized.