Text with two colors

Question

I would like to have a text that switches its color at a certain point x. I have provided a sample that uses the text twice to produce the result, with the switch at 45px. I

Answer 1

Got it! Mixed a few things from the answers together to get this:

div{
  border: 1px solid #000;
  position: relative;
  display: inline-block;
}
div>span{
  color: rgba(0, 0, 0, 0);
  z-index: 3;
}

div:before, div:after{
  content: attr(data-content);
  position: absolute;
  top: 0;
  left: 0;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
div:before{
  color: blue;
  clip: rect(0 200px 40px 45px);
  z-index: 1;
}
div:after{
  color: red;
  clip: rect(0 45px 40px 0);
  z-index: 2;
}

    Some bicolored Text

Upvoted all the answers for partial solutions.