radial-2a.html
<div style="background: radial-gradient(closest-side at 100px 100px, yellow -10px, #ff0000 0, #0000ff 50px); width: 300px; height: 300px;"><br></div>
<div style="background: radial-gradient(closest-side at 100px 100px, yellow -10px, #ff0000 0, #0000ff 50px); width: 300px; height: 300px;"><br></div>