Is black the purest color or the purest color? (in fine art painting)

Basic types of purity comparison

After two or more kinds of color matching, the color contrast effect caused by different purity is called purity contrast. It is another important brightness contrast of color contrast.

On the other hand, because it is hidden and internal, it is easy to be fooled. In color design, purity contrast is the key to determine whether the color tone feels gorgeous, elegant, simple, vulgar and subtle. The intensity of its contrast depends on the distance between colors on the color scale such as purity. The longer the distance, the stronger the contrast, and vice versa. If the gray to pure bright color is divided into 10 arithmetic progression, 1-3 is usually divided into low purity areas, 8- 10 is divided into high purity areas, and 4-7 is divided into medium purity areas (as shown in the figure). When choosing hue, when the distance between the primary color and the contrast color is above 5 levels, it is called strong contrast; Grade 3-5 is called medium contrast; 1-2 is called weak contrast. According to this, nine basic types of purity comparison can be divided. (1) fresh emphasis, such as 10: 8: 1, feels bright, vivid, lively, gorgeous and strong. (2) A fresh midrange such as 10: 8: 5 is more exciting and vivid. (3) Fresh and elegant colors, such as 10: 8: 7, are harsh, tacky, naive, primitive and hot because of their high color purity. If the distance between them is large, this effect will be more obvious and intense. (4) It is appropriate and popular to emphasize such as 4: 6: 10 or 7: 5: 1. (5) If the middle key is 4: 6: 8 or 7: 6: 3, it feels gentle, static and comfortable. (6) Moderately weak sounds such as 4: 5: 6. I feel dull, vague and monotonous. (7) Gray emphasis, such as 1: 3: 10, feels generous, elegant and lively. (8) The hue in gray is as high as 1: 3: 6, which makes them feel mutual, calm and generous. (9) The gray tone is weak, such as 1: 3: 4, and it feels elegant, delicate, attractive, subtle, hazy and powerless. In addition, there is the weakest achromatic color contrast, such as white: black, dark gray: light gray and so on. Because the purity of each color is zero, it feels generous, solemn, elegant and simple.