Change color of one character in a text box HTML/CSS

Question

I\'m designing a web site and i would like to ask you guys that, how can I change the color of just one character in a string in a text box of HTML by CSS?

example

Answer 1

I just want to add to the solution if you want to change color of only first character then there is a CSS selector element::first-letter

example:

div::first-letter{
   color: red;
}