CMYK color model of the primaries: cyan and yellow produce green, cyan and magenta produce blue, yellow and magenta produce red (these subtractive secondary colors correspond roughly to the additive primary colors), plus layering all three of them resulting in black. With halftoning, a full continuous range of colors can be produced. To improve print quality and reduce moiré patterns, the screen for each color is set at a different angle. While the angles depend on how many colors are used and the preference of the press operator, typical CMYK process printing uses any of the following screen angles: The "black" generated by
Blue and Green Music the eye." The painting is part of the Alfred Stieglitz collection, a gift by the artist to the museum in memory of her husband. Blue and Green Music Blue and Green Music is a 1919–1921 painting by the American painter Georgia O'Keeffe. Painted in her New York years upon the idea that music could be translated into something for the eye, "Blue and Green Music" is a work of rhythm, movement, color, depth, and form. It is also one of the paintings that was expressed by her feelings. The painting uses colors that are both subtle and bold in order