蛍光ペン

.highlighter-blue { background:linear-gradient(transparent 75%, #6cf 60%); }
.highlighter-yellow { background:linear-gradient(transparent 75%, #ff6 60%); }
.highlighter-green { background:linear-gradient(transparent 75%, #6f6 60%); }
.highlighter-pink { background:linear-gradient(transparent 75%, #f6c 60%); }
.highlighter-purple { background:linear-gradient(transparent 75%, #ce9eff 75%); }