chromium/src/third_party/blink/web_tests/fast/events/touch/resources/compositor-touch-hit-rects.css

html[dumpRenderTree] {
  font-family: Ahem;
}
#tests {
 font-size: 10px;
 width: 300px;
}
#tests > div {
  margin: 5px;
}
.testcase:not(.generated), .testcase *:not(.generated) {
  border: 1px solid red;
}
/* For manually visualizing how elements respond to hit-testing */
.testcase:not(.generated):active, .testcase *:not(.generated):active {
  background-color: yellow;
}