Toggle Button

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="512"
    height="512"
    viewBox="0 0 512 512"
>
    <linearGradient
        id="a"
        x1="256"
        x2="256"
        y1="512"
        y2="0"
        gradientUnits="userSpaceOnUse"
    >
        <stop offset="0" stop-color="#addcff" />
        <stop offset=".503" stop-color="#eaf6ff" />
        <stop offset="1" stop-color="#eaf6ff" />
    </linearGradient>
    <linearGradient
        id="b"
        x1="256"
        x2="256"
        y1="380.353"
        y2="131.647"
        gradientUnits="userSpaceOnUse"
    >
        <stop offset="0" stop-color="#00c0ff" />
        <stop offset="1" stop-color="#5558ff" />
    </linearGradient>
    <circle cx="256" cy="256" r="256" fill="url(#a)" />
    <path
        fill="url(#b)"
        d="M371.471 202.706c19.595 0 35.529-15.934 35.529-35.529s-15.935-35.53-35.529-35.53H179.962c8.522 9.451 13.861 21.831 13.861 35.53 0 13.698-5.339 26.079-13.861 35.529zm-230.942 0c19.595 0 35.53-15.934 35.53-35.529s-15.934-35.53-35.53-35.53c-19.595 0-35.529 15.935-35.529 35.53s15.935 35.529 35.529 35.529zm230.942 106.588H179.962c8.522 9.45 13.861 21.831 13.861 35.529s-5.339 26.079-13.861 35.53h191.509c19.595 0 35.529-15.935 35.529-35.53s-15.935-35.529-35.529-35.529zm-230.942 0c-19.595 0-35.529 15.934-35.529 35.529s15.935 35.53 35.529 35.53c19.595 0 35.53-15.935 35.53-35.53s-15.934-35.529-35.53-35.529zm0-17.765h191.509c-8.522-9.45-13.861-21.831-13.861-35.529s5.339-26.079 13.861-35.529H140.529C120.935 220.471 105 236.405 105 256s15.935 35.529 35.529 35.529zm230.942-71.058c-19.595 0-35.53 15.934-35.53 35.529s15.934 35.529 35.53 35.529C391.065 291.529 407 275.595 407 256s-15.935-35.529-35.529-35.529z"
    />
</svg>