Color and tone are the essence of painting as sound and pitch are of music. Color is highly subjective, but has observable psychological effects, although these can differ from one culture to the next. Black is associated with mourning in the West, but elsewhere white may be. Some painters, theoreticians, writers and scientists, including Goethe, Kandinsky, Newton, have written their own color theory. Moreover the use of language is only a generalisation for a color equivalent. The word "red", for example, can cover a wide range of variations on the pure red of the visible spectrum of light. There is not a formalised register of different colors in the way that there is agreement on different notes in music, such as C or C# in music, although the Pantone system is widely used in the commercial printing and graphic design industry for this purpose.

For a painter, color is not simply divided to basic and derived (complementary or mixed) colors (like, red, blue, green, brown, etc.). Painters practically deal with pigments, so "blue" for a painter can be any of blues: phtalocyan, Paris blue, indigo, cobalt, ultramarine, etc. Psychological, symbolical meanings of color are not strictly speaking means of painting. Colors only add to the potential, derived context of meanings, and because of this the perception of a painting is highly subjective. The analogy with music is quite clear - tones in music (like "C") are analogous to "shades" in painting, and coloration in painting is the same as the specific color of certain instrument - these do not form a melody, but can add different contexts to it.

Rhythm is important in painting as well as in music. Rhythm is basically a pause incorporated into a body (sekvence). This pause allows creative force to intervene and add new creations - form, melody, coloration. The distribution of form, or any kind of information is of crucial importance in the given work of art and it directly affects the esthetical value of that work. This is because the esthetical value is functionality dependant, i. e. the freedom (of movement) of perception is perceived as beauty. Free flow of energy, in art as well as in other forms of "techne" directly contributes to the esthetical value.

Modern artists have extended the practice of painting considerably to include, for example, collage which began with Cubism and is not painting in the strict sense. Some modern painters incorporate different materials such as sand, cement, straw or wood for their texture. Examples of this are the works of Jean Dubuffet or Anselm Kiefer. (There is a growing community of artists who use computers to literally paint color onto a digital canvas using such programs as Photoshop, Painter, and many others. These images can be printed onto traditional canvas if required.)

In 1829, the first photograph was produced. From the mid to late 19th century, photographic processes improved and, as it became more widespread, painting lost much of its historic purpose to provide an accurate record of the observable world. There began a series of art movements into the 20th century where the Renaissance view of the world was steadily eroded, through Impressionism, Post-Impressionism, Fauvism, Expressionism, Cubism and Dadaism. Eastern and African painting, however, continued a long history of stylization and did not undergo an equivalent transformation at the same time.

Modern and Contemporary Art has moved away from the historic value of craft and documentation in favour of concept; this has led some to say that painting, as a serious art form, is dead, although this has not deterred the majority of artists from continuing to practise it either as whole or part of their work.

Color  is the visual perceptual property corresponding in humans to the categories called red, yellow, white, etc. Color derives from the spectrum of light (distribution of light energy versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects, materials, light sources, etc., based on their physical properties such as light absorption, reflection, or emission spectra.

Typically, only features of the composition of light that are detectable by humans (wavelength spectrum from 400 nm to 700 nm, roughly) are included, thereby objectively relating the psychological phenomenon of color to its physical specification. Because perception of color stems from the varying sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.