It is an impressionism painting and portrait. The background uses very dark color, or shade color. The background is not only black, it has some volume, it has dark blue, dark violet-blue, black and a little bit red-violet. From left to right, the color change from black to dark blue to dark violet to red-violet and black. But we can still see the color around the women is the little bit lighter. It used tone color, which means add some gray in that paint. You can see some texture one the background. The main color on the women is yellow and blue. The women’s face has some different volume. For example, the highlights is forehead and chin. It has some tint color, some light color. But for cheek, Van Gogh used some orang-yellow color to show the different volume. The colors on the dress are lighter than the background. Instead of using lines to show the shape, Van Gogh used the dark color to show different parts of the dress. For example, he used dark blue to show the drapes on the sleeve. But he used some black curve lines to divide the different part of the hair. All the lines you see in this painting is curved