Yellow - is a colour of opposite meanings. It is a light, sunbeam, the colour of amber, rye-field, steppes, it is a nobleness, harmony, maturity, cleverness and old age. However, in the Medieval Ages it has become a symbol of betrayal, hypocrisy, degradation, lie, greediness, money, jealousy (Judas' clothes and sometimes the clothes of St. Peter and St. Joseph are yellow ones). This colour has marked the places of plague epidemic, in Iran - it is an image of the infectious diseases. In the visual information - it has the meaning of attention, premonition, the imitation of gold.