From the original and early colors of nature and the color of the sky and the water of the meter and the third (from above) in the rainbow. Blue is a soothing and powerful color that gives methane and loyalty and faith, and in colour categories it is a component of cold colors, on the red picture that is in the category of warm colors. The wavelength of this color is between 460-480 (hang:light). The blue color in the cream work of the rug consumes a lot and uses its harmony and contrast to other colors for the decoration of the rug and texture of the types of roles, a type of blue color from hydrosulphide and profit, along with other colors, and adds to its attractiveness and vitality: for example, it keeps on the dark side and dark side of the dark side. The location of this color in the painting or rug is an effect on the rise of its manifestation. If the above is lighter, and if placed below, it will be heavier and synonymous. This color is easily converted to green or purple by mixing on a yellow or red basis.