css - Change text color black to white on overlap of bg

Question

I have a div that is positioned absolute with a background color gradient. I have this text on it that I want to change to the color white as I scroll the text up.

I'm using the 'mix-blend-mode' property to achieve this currently but I can't find any setting that will turn the text from black to white. Has anyone done this before or can think of a trick I can do?

.bg-container {
  position: fixed;
  top: -30px;
  left: 0;
  width: 100px;
  height: 100px;
}

.gradient-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100px;
  height: 200px;
  background-image: linear-gradient(to bottom, rgb(100, 182, 240) 15%, rgb(81, 155, 244));
  transform: skewY(-15deg);
}

.scroll-content {
  position: absolute;
  top: 50px;
}

.scroll-content p {
  color: #000;
  mix-blend-mode: overlay;
}

/*hack for iOS*/
.scroll-content p:after{
    content: '200c'
}

<div class="bg-container">
  <div class="gradient-background">
    &nbsp;
  </div>
</div>
<div class="scroll-content">
  <p> abc 1 </p>
  <p> abc 2 </p>
  <p> abc 3 </p>
  <p> abc 4 </p>
  <p> abc 5 </p>
  <p> abc 6 </p>
  <p> abc 7 </p>
  <p> abc 8 </p>
  <p> abc 9 </p>
  <p> abc 10 </p>
  <p> abc 11 </p>
  <p> abc 12 </p>
  <p> abc 13 </p>
  <p> abc 14 </p>
  <p> abc 15 </p>
  <p> abc 16 </p>
  <p> abc 17 </p>
  <p> abc 18 </p>
  <p> abc 19 </p>
</div>

Answer 1

You can use gradient to color the text. The trick is to have this gradient similar to your shape (same degree and coloration change at the edge of the shape). Since your skewed element is fixed, you need to make the gradient to also be fixed to create the magic effect of text scrolling:

.gradient-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100px;
  height: 200px;
  background-image: linear-gradient(to bottom, rgb(100, 182, 240) 15%, rgb(81, 155, 244));
  transform: skewY(-15deg);
  transform-origin:left;
}

.scroll-content {
  position: absolute;
  top: 50px;
  /* 165deg = 180deg - 15deg   */
  background: linear-gradient(165deg, #fff 195px,#000 195px) fixed;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

<div class="gradient-background">
</div>
<div class="scroll-content">
  <p> abc 1 </p>
  <p> abc 2 </p>
  <p> abc 3 </p>
  <p> abc 4 </p>
  <p> abc 5 </p>
  <p> abc 6 </p>
  <p> abc 7 </p>
  <p> abc 8 </p>
  <p> abc 9 </p>
  <p> abc 10 </p>
  <p> abc 11 </p>
  <p> abc 12 </p>
  <p> abc 13 </p>
  <p> abc 14 </p>
  <p> abc 15 </p>
  <p> abc 16 </p>
  <p> abc 17 </p>
  <p> abc 18 </p>
  <p> abc 19 </p>
</div>