The key to improve the ability of color expression

Color is a very important and attractive artistic language in painting. Color sketching is a powerful means to reproduce nature and reproduce the real moving of life. In the process of painting, the correct observation and mastery of the color laws of the objective objects can improve the resolution of color and the ability to use color modeling, is the key to color painting. Therefore, to improve the painting level of color painting, not only to strengthen the color consciousness, but also to master the overall observation of color painting methods and methods of expression.

First, strengthen the color consciousness

The color of the object comes from the color of the light source and the ability of the different objects to absorb and reflect on the optical selection. For objects of color, different people or the same person at different times and places, the color of their understanding and feelings are different. Therefore, in order to better understand and use color, must have a comprehensive understanding of color.

1, the understanding of color

Scientific practice has proved that the color of the object is formed by the illumination of light, without light there is no color. Color is a kind of visual effect caused by the stimulation of light, which is the cause of its occurrence, and color is the result of its sensation. The color of painting is divided into two categories: sketching color and decorative color. Decorative color focus on the contrast of the natural color, coordination, color combinations, tones and other issues, in the use of color than the color of the painting to pay attention to the color of the simple and large color of the contrast, subjective strong, and the color of the painting also consider the intrinsic color factors, tonal coordination problems, But it pays more attention to the objective color change of the objects under different illumination conditions and the influence of the color between the various color relations. They are different from each other and complementary to each other, whether it is painting color or decorative color, both have the expertise and limitations, in the color training can not be separated from each other, we should penetrate each other to understand color, experience color.

2, Understanding the body color

Color and body is an important factor of painting, they are interdependent unity of interdependence, it is the shape and color produced by the image so that we get the enjoyment of art. The color of the form mainly comes from three aspects, namely the light source color, the environment color, the intrinsic color. Light color is by the length of the Yuguangpo different, forming a different color of light, painting called light source color. Light emitted by different light sources, due to the length, strength and proportion of light waves, the formation of light color is also different. Light source color is the color of light itself, it affects the color of objects. The color phenomenon in nature is precisely due to the difference of light source color and its change to make the color of the object become colorful. The intrinsic color is the light object to the light source color absorption and reflection of the formation, because the absorption of various objects and reflect the nature of the shade, in people's visual formation of different colors, we say that the color of the object is the inherent color. "Intrinsic color" is a forbidden concept, there is no "intrinsic color" in the world.

Because the color of the object is limited by the light, the object itself does not appear in a constant color, people say that the inherent color is in the relatively soft sunlight rendering color impression, with the light source color and surrounding objects change color, therefore, "intrinsic color" will not be fixed. Although modern physics has repeatedly proved that the intrinsic color does not exist, in order to study the convenience and convenient to the ordinary people's observation habit, the light source color and the intrinsic color of the object are considered as separate concepts. As a hypothesis, solid color has the necessary and value of existence, it not only adapts to people's intuition and habit, but also facilitates people's color observation, analysis and research of objects. Without this assumption, the color of an object is difficult to describe.

Any object in the world is in a specific environment rather than isolated existence, color is no exception. Environmental color is due to the reflection of color, resulting in the same space object color interaction and formation. This is a very important concept, it emphasizes that the depicted object is affected by the ambient color of the reflected light, the color is presented with the light source of the radiation is inseparable, with an objective and realistic visual feeling. Therefore, the same scene on different objects, through absorption and reflection, each other will be affected by different degrees of shade, light source color, natural color and environmental color of the three have the main constraints, the formation of a harmonious and unified color overall. In the color sketch, we should strengthen the variable consciousness of the color, correctly understand and grasp the relationship between the three images, and prevent the excessive emphasis on the color change of the object and neglect the body.

3, grasp the space color

To grasp the color by feeling, it is necessary to correctly recognize and understand the relationship between color and space to solve the essential problem. Because the scattering degree of the light wave is different, the wavelength is different, and the color changes in the transfer of the space. The space is close, the object contour is clear, the light and shade tonal difference is big, the space distance is far, the object object contour is blurred, the light and shade tonal difference is small, the object dark and dark level is not clear and tonal unification. At the same time, due to air and other space factors, different distances of the object, its color purity and warm and cold will also change, from the painter far color more gray or colder. Thus, the Basic Law of spatial color is nearly warm, far-away, near-pure, near-clear, far-blurred, near-contrast strong, far-contrast weak. Using the relationship between color and space, we can express three-degree space with long, wide and deep in two-degree space.