Improving Our Ad Campaign

Recently in class, we were tasked with creating an ad campaign for a fictitious phone called the "Gotcha".  Our ads are the following:

I would like to simply make the ads a little more age-appropriate through the use of contrasting line colors.  For example, green lines on the red background, and so on.  The black lines are a sort of sophisticated and older style.  After doing this, I think our ads will be more appealing to our target market.