Analysis of the use of RGB colors in CSS

This article mainly introduces the detailed explanation of the use of RGB colors in CSS. It is the basic knowledge for introductory learning of CSS. Friends in need can refer to

RGB color model explanation

The RGB color model is a method of describing how much of the three primary colors of red, green, and blue are in a certain color, just like mixing watercolor paints or oil paints to get the real color we want.

Imagine if you want to match a pure blue. To achieve this, you cannot put red and green into this color. So we set red and green to 0%, and set green to 100%:

rgb(0%, 0%, 100%)

Result:

But if what you want is not blue but purple, then How to do it? We can get mauve by mixing 100% red and 100% blue:

rgb(100%, 0%, 100%)

Result:

From basic color theory, we know that no color is black. So in order to get black, we can achieve it by setting the three primary colors of red, green, and blue to 0%:

rgb(0%, 0%, 0%)

Result:
How to determine the value of RGB color

We can use Photoshop’s picker The color slider function is used to obtain the values ​​​​of the three primary colors of red, green, and blue for a specific color, but there are also free online tools such as Color Slider and The RGB Color Calculator.

w3school’s explanation of RGB color:

RGB color

All browsers support RGB color values.

RGB color value is specified as follows: rgb(red, green, blue). Each parameter (red, green, and blue) defines the intensity of the color and can be an integer between 0 and 255, or a percentage value (from 0% to 100%).

For example, the rgb(0,0,255) value is displayed in blue because the blue parameter is set to the highest value (255) and the others are set to 0.

Similarly, the following values ​​define the same color: rgb(0,0,255) and rgb(0%,0%,100%).
Example

p   
{   
background-color:rgb(255,0,0);   
}

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