Just figured this out. Had to use the following. As I'm pretty new to this stuff I'm not sure I exactly how it works, just glad it does.
Found the base code here: https://forums.adobe.com/thread/2171928
My new code:
canvas.addEventListener("mouseover", over.bind(this));
function over()
{
TweenMax.to(this.darken, 1.25, {alpha:1, ease:Back.easeOut});
TweenMax.to(this.learnMore_white, 1.25, {alpha:1, ease:Back.easeOut});
TweenMax.to(this.learnMore_blue, 1.25, {alpha:0, ease:Back.easeOut});
}
canvas.addEventListener("mouseout", out.bind(this));
function out()
{
TweenMax.to(this.darken, 1.25, {alpha:0, ease:Back.easeOut});
TweenMax.to(this.learnMore_white, 1.25, {alpha:0, ease:Back.easeOut});
TweenMax.to(this.learnMore_blue, 1.25, {alpha:1, ease:Back.easeOut});
}