<div id=chart>
  <div id=chart-shape>⬠</div>
  <div id=chart-value></div> 
</div>

#chart-shape {
	font: 300px/300px serif;
	text-align: center; 
	color: limegreen;
}
#chart-value {
  background: conic-gradient(transparent 75%, darkseagreen 75%);
  mix-blend-mode: screen;
}
#chart {
	width: 300px;
	height: 300px;
	display: grid;
	margin: auto;
	margin-top: calc(50vh - 150px);
	background: white;
}
#chart * {
	height: inherit;
	grid-area: 1 / 1;
}