<html>
<head>
<style>
    svg {
        width: 800px;
        display: none;
    }
    div {
        width: 200px;
        height: 200px;
    }
    #gradient {
        position: absolute;
        width: 200px;
        height: 200px;
        background-image: conic-gradient(blue, black);
        filter: url(#posterize);
    }

    .x {
        position: absolute;
        -webkit-clip-path: polygon(0% 0%, 0% 5%, 45% 50%, 0% 95%, 0% 100%, 5% 100%, 50% 55%, 95% 100%, 100% 100%, 100% 95%, 55% 50%, 100% 5%, 100% 0%, 95% 0%, 50% 45%, 5% 0%);
    }
    #x {
        background-color:black;
    }
    .plus {
        position: absolute;
        -webkit-clip-path: polygon(45% 0%, 55% 0%, 55% 45%, 100% 45%, 100% 55%, 55% 55%, 55% 100%, 45% 100%, 45% 55%, 0% 55%, 0% 45%, 45% 45%);
    }
    #plus {
        background-color:black;
    }
</style>
</head>

<body>
<svg viewBox="0 0 700 100">
<defs>
    <filter id="posterize" filterUnits="objectBoundingBox" primitiveUnits="objectBoundingBox">
        <feComponentTransfer color-interpolation-filters="sRGB">
            <feFuncR type="discrete" tableValues="0 0.125 0.25 0.375 0.5 0.625 0.75 0.875"/>
            <feFuncG type="discrete" tableValues="0 0.125 0.25 0.375 0.5 0.625 0.75 0.875"/>
            <feFuncB type="discrete" tableValues="0 0.125 0.25 0.375 0.5 0.625 0.75 0.875"/>
        </feComponentTransfer>
    </filter>
</defs>
</svg>

<div>
    <div id="gradient"></div>
    <div id="x" class="x"></div>
    <div id="plus" class="plus"></div>
</div>
</html>