The visual identity of OGŠ Ivan Zajc is based on two visual divisions of the relationship between pitch and duration of tone. To define the pitch, a scale from c to h is created with each tone assigned a specific color. To define the duration of the tone, graphic elements are created that are related to a particular note (hexadecimal, octave, etc.) and thus defined graphic elements are used in creating the "composition" of the logo in the drawing. The system obtained in this way has an educational role and is important for the development of synesthesia in children.