By default, bar codes are RGB black, but you can change their color easily. Simply cut the bar code by pressing Ctrl+X. Next, click Edit > Paste Special, and in the Paste Special dialog box, click Picture (Metafile) to paste the bar code as a group of objects. Now, you can change the color of all objects as well as the font of text.
 
Tip provided by Ariel Garaza Díaz, CorelDRAW Master and Graphic Designer.