Color applications in web design

1. The basic concept of color the color in nature can be divided into two categories: non-color and color. Non-color refers to black, white, and various shades of gray, and all other colors are color. Any color has three attributes:

(1) Hue: It is also called color. It is the basic feature of color and reflects the basic appearance of color.

(2) Saturation (Saturation): also called Purity, refers to the purity of the color.

(3) Brightness (Brightness, Lightness, or Luminousity): It is also called Brightness, reflecting the color depth. Non-color features only brightness, no difference between hue and saturation.

2. The color of the three primary colors of the computer screen is composed of RGB (red, green, blue) three colors of light, however, by adjusting these three colors, we can adjust other colors. In many image processing software, we provide the color allocation function, you can enter a three-color value to adjust the color, or you can directly select the color based on the color palette provided by the software.

3. Color of computer images the color of computer images is calculated and combined by BIT. Pure black and white images are the simplest color structures, one-digit data is used on the computer. Although it is only black and white, black and white can still be combined into an approximate gray order through dense matrix arrangement. Grayscale has a total of 256 levels of images, which look similar to traditional black and white photos. In addition to the black and white colors, there are still 254 gray shades, the computer must use 8 yuan of information to display the 256 levels. Full color refers to all colors that RGB three colors can display. Each color is represented in 8 bits. Each color has 256 levels, and the three colors increase or decrease in interaction, the 24-bit 16.77 million color (256*256*256 = 16,777,216) is displayed. This value is the highest color that the computer can represent, that is, RGBTureColor. An 8-digit color is an image with 256 levels or 256 colors. We often see that an image file in GIF format is an image file with 256 colors. To convert a 24-digit full-color image into a 256-color 8-digit image, you must follow the indexing procedure (Indexed), that is, in the 16.77 million color of the original 24-digit image, first create a color distribution table (histogram), then find the most commonly used 256 colors, define a new color palette, and then replace the original image with the 256 color of the new color tray. Let's see how many colors each color contains: 1-digit, 2-digit, 4-digit, 16-digit, 16-digit, 2-digit, 2-digit, 4-digit, 16-digit, 256-digit, 65536-digit, 16.77 million-digit, 16.77 million-digit, 256-color, and-level gray value the standard VGA display mode is usually referred to as the 8-bit display mode for 36-bit, 68.7 billion-color, and 4096-level gray values, that is, 256 colors can be displayed in this mode, while the high Color (Hi Color) is a 16-bit display mode, which can display 65536 colors, also known as 64 k colors; there is also a True Color display mode, which is a 24-bit display mode that can display 16.77 million colors, also known as 16 m colors. This is the highest Color display mode that can be achieved by a PC, in this mode, the color of the true color image is no different from that of the high-definition image. We have mentioned the importance of colors on pages in graphic production films, and try to use elegant and concise colors on pages; for example, the background should be as dark and deep as possible (unless otherwise required), and the subject of the root page should be the dominant color. Some friends who do not engage in art may not know the meaning of the color, see the following table: red represents enthusiasm, unrestrained, joy, celebration Black: represents serious, night, calm; yellow: represents noble, rich white: represents pure, simple blue: representing the sky, refreshing and Green: Representing plants, life, and life Gray: representing darkness, negative purple: representing romance, love Brown: representing the meaning of several main colors on the land, hope to help you. Now we have a basic understanding of color, so how can we reasonably match color in a webpage? If you know more about art, it's easy. On the contrary, you may have to spend a lot of time on it. First, after determining the subject of the home page, you need to know which colors are suitable for which sites. For example, a video site basically applies to any color, but B thinks it is better to use black or other deep-learning colors, because people watch TV and movies in a dark environment, the dark color on the webpage is more in line with people's habits. On the contrary, a site introducing hospitals and medicine should use light colors, let's look at the atmosphere of its medical site. Remember that the white page is a universal style. Here, we should pay special attention to the following: the color of the page text should be distinguished from the color of the link. If you have extra time during design, you can change the color to several more colors.