close button shows up purple

The close button transparency shows up purple. can not figure out where the code is messed up for the life of me. http://www.caileerae.com is the website. i have tryed a clean install of the plugin as well and still same result any thoughts? `/*
ColorBox Core Style:
The following CSS is consistent between example themes and should not be altered.
*/
#colorbox, #cboxOverlay, #cboxWrapper{position:absolute; top:0; left:0; z-index:99999; }
#cboxOverlay{position:fixed; width:100%; height:100%;}
#cboxMiddleLeft, #cboxBottomLeft{clear:left;}
#cboxContent{position:relative;}
#cboxLoadedContent{overflow:auto; -webkit-overflow-scrolling: touch;}
#cboxTitle{margin:0;}
#cboxLoadingOverlay, #cboxLoadingGraphic{position:absolute; top:0; left:0; width:100%; height:100%;}
#cboxPrevious, #cboxNext, #cboxClose, #cboxSlideshow{cursor:pointer;}
.cboxPhoto{float:left; margin:auto; border:0; display:block; max-width:none;}
.cboxIframe{width:100%; height:100%; display:block; border:0;}
#colorbox, #cboxContent, #cboxLoadedContent{box-sizing:content-box; -moz-box-sizing:content-box; -webkit-box-sizing:content-box;}

/*
User Style:
Change the following styles to modify the appearance of ColorBox. They are
ordered & tabbed in a way that represents the nesting of the generated HTML.
*/
#cboxOverlay{background:#000; }

#colorbox{outline:0;}
#cboxLoadedContent{border:5px solid #000; background:#fff;}
#cboxClose{
display: block;
background:url(images/closeButton.png) no-repeat;
text-indent:-9999px;
border: 0;
position: absolute;
top: -15px;
right: -15px;
z-index: 99999;
width: 51px;
height: 43px;
overflow: hidden;

}
/*#cboxClose:hover{background-position:bottom center;}*/
`
here is the code for the close box which looks fine. Any ideas?

https://wordpress.org/plugins/m-wp-popup/