colour change

I just had a ticket answered and closed here: https://www.experts-exchange.com/questions/27844907/CSS-advice-for-menu-text-size.html

bportlock asked me too add some code to the bottom of my css file to make the titles bigger, my boss has now decided he wants them a different colour and underlined too.

Can anyone advise an easy way to do this, I am a novice at css.

the code added to the bottom of my css file was this:

#pages-3 ul li a {
    font-size: 2.0em;
}

#pages-3 ul li ul li a {
    font-size: 1.0em;
}  

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Regards

James