Yes,
<span style="color:red">character</span>
You may also put the color codes in an external stylesheet, this may save you a lot of time if you decide to change the colors later. Then you only need to change one file. Here is how to include it:
<link href="chineeseColours.css" type="text/css" rel="stylesheet" />
Example of the stylesheet:
span.character_one
{
color:red;
}
span.character_two
{
color:blue;
}
then a card could look like
<link href="chineeseColours.css" type="text/css" rel="stylesheet" />
<span class="character_one">A</span>
<span class="character_two">B</span>