[html]
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="loader"></div>
</body>
</html>

<style>
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #000;
}

.loader {
    position: relative;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(45deg, transparent, transparent 40%, #e5f403);
    animation: animate 2s linear infinite;
}

@keyframes animate {
    0% {
        transform: rotate(0deg);
        filter: hue-rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
        filter: hue-rotate(360deg);
    }
}

.loader:before {
    content: '';
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
    background: #000;
    border-radius: 50%;
    z-index: 1000;
}

.loader:after {
    content: '';
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    background: linear-gradient(45deg, transparent, transparent 40%, #e5f403);
    border-radius: 50%;
    z-index: 1000;
    z-index: 1;
    filter: blur(30px);
}
</style>

[/html]

На чистом html и css

html

Код:
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="loader"></div>
</body>
</html>

css

Код:
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #000;
}

.loader {
    position: relative;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(45deg, transparent, transparent 40%, #e5f403);
    animation: animate 2s linear infinite;
}

@keyframes animate {
    0% {
        transform: rotate(0deg);
        filter: hue-rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
        filter: hue-rotate(360deg);
    }
}

.loader:before {
    content: '';
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
    background: #000;
    border-radius: 50%;
    z-index: 1000;
}

.loader:after {
    content: '';
    position: absolute;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    background: linear-gradient(45deg, transparent, transparent 40%, #e5f403);
    border-radius: 50%;
    z-index: 1000;
    z-index: 1;
    filter: blur(30px);
}

Android 8.1.0, Chrome,70.0.3538.110