What do they mean with use RGB colors red and nlue

What do they mean with use RGB colors red and nlue
0

#1
<style>
  .red-text {
    color: red;
  }
  .orchid-text {
    color: rgb(218, 112, 214);
  }
  .sienna-text {
    color: rgb(160, 82, 45);
  }
  .blue-text {
    color: blue;
  }
  
</style>

<h1 class="red-text">I am red!</h1>

<h1 class="orchid-text">I am orchid!</h1>

<h1 class="sienna-text">I am sienna!</h1>

<h1 class="blue-text">I am blue!</h1>

#2

RGB stands for red, green and blue, the range goes from 0 to 255, if I wanted to create a green it would be rgb(0, 255, 0). Give it a try!