Hello,
You can style by css (ex file style.css in your theme)
Ex: Background #fff and text color #000
#powerTip {
background-color: #fff;
}
#powerTip.n:before {
border-top: 10px solid rgb(255, 252, 252);
}
#powerTip.s:before {
border-bottom: 10px solid #fff;
}
#powerTip.e:before {
border-right: 10px solid #fff;
}
#powerTip.w:before {
border-left: 10px solid #fff;
right: -10px
}
#powerTip.ne:before,#powerTip.nw:before {
border-top: 10px solid #fff;
border-top: 10px solid rgba(255,255,255,1);
}
#powerTip.se:before,#powerTip.sw:before {
border-bottom: 10px solid #fff;
border-bottom: 10px solid rgba(255,255,255,1);
}
#powerTip.nw-alt:before,#powerTip.ne-alt:before,#powerTip.sw-alt:before,#powerTip.se-alt:before {
border-top: 10px solid #fff;
border-top: 10px solid rgba(255,255,255,1);
}
#powerTip.sw-alt:before,#powerTip.se-alt:before {
border-bottom: 10px solid #fff;
border-bottom: 10px solid rgba(255,255,255,1);
}
.box_view_html {
color: #000;
}