What is the value of fff in css

In css, fff represents the color value, "#fff" is the abbreviation of the hexadecimal color code of white; hexadecimal is the code for setting the color value in the software, through A 6-digit hexadecimal value starting with a "#" represents a color. The 6-digit numbers are divided into three groups, which in turn represent the intensity of red, green, and blue colors.

The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.

What is the value of fff in css

#fff is the abbreviation of hexadecimal color code.

This color value represents white.

The hexadecimal color code is the code for setting the color value in the software. In many software, you will encounter the problem of setting color values. In daily life, any color is formed by the superposition of three basic colors. These three colors are called "three primary colors". Generally represented by RGB values.

Hexadecimal (abbreviated as hex or subscript 16) is a carry system that bases 16 on every 16 in mathematics. Generally represented by numbers 0 to 9 and letters A to F (or a~f), where: A~F means 10~15, these are called hexadecimal numbers.

The hexadecimal color code represents a color through a 6-digit hexadecimal value starting with "#". The 6-digit numbers are divided into 3 groups, with two digits in each group, representing the intensity of the three colors red, green, and blue in turn.

You can use the RGB color value and hexadecimal color code conversion tool

Expand your knowledge

There are two types of colors that human eyes see:

⒈ One is the color emitted by the luminous body, such as the color displayed on the computer monitor screen;

⒉ The other The object itself does not emit light, but the color produced by reflected light, such as the colors in newspapers and magazines.

We also know that any color is formed by the superposition of the three most basic colors. These three colors are called "three primary colors".

⒈ For the first color mentioned above, that is, the color mode of the illuminant, also known as the "additive color mode", the three primary colors are "red", "green" and "blue" . The additive color mode is also called the "RGB mode";

⒉ The color mode for printed matter is also called the "subtractive color mode". Its three primary colors are "cyan", "magenta" and "yellow". "three colors. Subtractive color mode is also called "CMYK" mode.

For example, if you want to specify a color on a web page, you must use the RGB mode to determine it. The method is to specify R/G/B respectively, that is, the intensity of the three primary colors of red/green/blue. Usually it is specified , the minimum intensity of each color is 0 and the maximum is 255, and are usually expressed in hexadecimal values. Then 255 corresponds to hexadecimal FF, and the three values ​​​​are juxtaposed in order, starting with #.

For example, the color value "#FF0000" is red because the value of red reaches the highest value FF (that is, 255 in decimal), and the remaining two colors have an intensity of 0. For example, "#FFFF00" represents yellow, because when both red and green are at their maximum values, and blue is 0, yellow is produced.

At this point, we know the commonly used expression methods of color. For example, as defined in the HTML Language Specification, colors can be specified in two ways.

⒈ One way is to use defined color names. The specific color names are different for different browsers.

⒉ Another way is to represent a color through a 6-digit hexadecimal value starting with "#". The 6-digit numbers are divided into 3 groups, with two digits in each group, representing the intensity of the three colors red, green, and blue in turn. In RGB color mode, color is represented by three numerical values ​​indicating the intensity of the red, green, and blue components. From the minimum value 0 to the maximum value 255, when all colors are displayed at their lowest values, the color will be black, and when all colors are displayed at their maximum values, the color will be white. However, one confusing aspect of the RGB color model is that all of these colors may be represented in a variety of ways.

Color science describes colors in the range 0.0 to 1.0 (minimum to maximum). Most color conventions take these values ​​to represent color variations. For example, 1.0,0.0,0.0 represents maximum intensity of red.

Other ways of representing color values ​​are by using percentages from 0% to 100% (minimum to maximum). This is the same method as above, to change the range from 0.0 to 1.0, simply multiply the number with 100.

Color values ​​may also be represented as numbers ranging from 0 to 255. This type of numerical representation is widely implemented by computer programmers to store each color value in an 8-bit byte. Full intensity red is represented as 255,0,0. Likewise the range, 0 to 255, and hexadecimal numbers in this range are usually written in a fixed two-digit format, representing it and represented in hexadecimal, in some cases prefixed (like #). Full intensity red written as #ff, #00, #00. This may be shrunk like #ff0000.

16-bit mode.

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