Lime Aqua Aurora Background
A fresh aurora wash of lime, mint and sky blue blended with soft radial gradients.
Preview and code
index.html
<div class='bg'><span>Your content</span></div>
styles.css
.bg{display:grid;place-items:center;width:100%;min-height:260px;position:relative;overflow:hidden;font:400 20px Georgia,serif;color:#1a1a1a;background:radial-gradient(70% 60% at 15% 5%,#eaff9c 0,transparent 70%),radial-gradient(70% 60% at 85% 25%,#b7f0cf 0,transparent 70%),radial-gradient(80% 60% at 55% 110%,#4aa3ec 0,transparent 70%),#e9f8ef}.bg span{position:relative}
About
A light aurora gradient: lime glow top-left, mint centre, azure pooling at the bottom. Pure CSS, no images.