How to convert css color

CSS Color Transformation

Color is a very important element in web design and development. I believe many people have encountered the following situation: In a design draft, the designer gives a favorite color value, but this color value cannot be directly used in CSS. At this time, we need to perform some color conversion operations to convert it into CSS color values.

Below, I will introduce common color conversion methods and how to use them.

1. RGB conversion

RGB is one of the most common color formats. In web design, we often use hexadecimal RGB format to represent colors.

In RGB, the color values ​​of the three primary colors of red, green, and blue are numbers between 0 and 255, representing different color light intensities.

For example, we represent the RGB values ​​of red as red (255,0,0), green (0,255,0), blue (0,0,255).

In order to convert RGB to CSS color values, we need to divide the RGB value by 255 and then format it into RGB (red, green, blue) format in CSS. As follows:

rgb(255, 0, 0) /*红色*/
rgb(0, 255, 0) /*绿色*/
rgb(0, 0, 255) /*蓝色*/

2. Hex Conversion

Another common color format is hexadecimal (Hex) representation. In Hex notation, color values ​​are represented using six hexadecimal digits. In CSS, use the # symbol.

In Hex notation, each two-digit number represents the brightness value of the three primary colors of red, green, and blue. Numbers range from 00 to FF, representing values ​​from 0 to 255. For example, the Hex value of red is #FF0000, the Hex value of green is #00FF00, and the Hex value of blue is #0000FF.

The conversion method is very simple. Just remove the # and six hexadecimal digits and express it in RGB format.

#FF0000 /*红色*/
#00FF00 /*绿色*/
#0000FF /*蓝色*/

3. HSL conversion

HSL is a very intuitive color format, which includes three parameters: hue, saturation and brightness.

Hue (hue) value represents the position of the color on the color plate, and the value range is 0 to 360. Saturation represents the depth of a color, ranging from 0% to 100%. Brightness (Lightness) represents the lightness and darkness of the color, and the value range is also from 0% to 100%.

The conversion method is also very simple, just use hsl (hue, saturation, lightness) format, as shown below:

hsl(0, 100%, 50%) /*红色*/
hsl(120, 100%, 50%) /*绿色*/
hsl(240, 100%, 50%) /*蓝色*/

4. HSLA conversion

HSLA is an enhanced version of the HSL format, which also includes a transparency (alpha) value. The transparency value ranges from 0 to 1, with 0 representing completely transparent and 1 representing completely opaque.

The conversion method is similar to HSL, except that the transparency value needs to be added at the end, expressed in hsla (hue, saturation, lightness, alpha) format. For example:

hsla(0, 100%, 50%, 0.5) /*半透明红色*/
hsla(120, 100%, 50%, 0.5) /*半透明绿色*/
hsla(240, 100%, 50%, 0.5) /*半透明蓝色*/

Summary

In web design and development, we need to use various color formats. Mastering these color conversion skills can not only improve development efficiency and reduce the possibility of errors, but also better meet the needs of designers.

The above are the commonly used color conversion methods, I hope it can be helpful to you.

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