rect.sparsity {
	stroke-width: 2px;
	fill: none;
	stroke: black;
}

path.sparsity {
	stroke-width: 4px;
	fill: none;
}

#regularized {
	stroke: #009CDE;
	color: #009CDE;
}
#unregularized {
	stroke: #FF8686;
	color: #FF8686;
}