Is there a way to specify colors in field scripting?

You can specify colors in field scripting. 

Here is an example that includes various ways to include color in your script:

<font face="trebucbd.TTF" cmyk="100,50,0,18" fontsize="12pt">@name@</font><br>
<font color="#ff3333">@addressone@<br>
@addresstwo@<br>
@city@, <font color="green">@state@</font> @zip@</font><br>
<font fontsize="10pt" face="Courier-Bold">@email@</font><br>
<font spot="gold:0,16,100,7">@website@</font>