Spectrum

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="512"
    height="512"
    viewBox="0 0 32 32"
>
    <linearGradient
        id="b"
        x1="2"
        x2="30"
        y1="30"
        y2="2"
        gradientUnits="userSpaceOnUse"
    >
        <stop offset="0" stop-color="#d7e6f9" />
        <stop offset="1" stop-color="#ccd3dd" />
    </linearGradient>
    <linearGradient
        id="a"
        x1="7.25"
        x2="12.75"
        y1="28.25"
        y2="22.75"
        gradientUnits="userSpaceOnUse"
    >
        <stop offset="0" stop-color="#617093" />
        <stop offset="1" stop-color="#3d4860" />
    </linearGradient>
    <linearGradient
        id="c"
        x1="10.25"
        x2="17.75"
        y1="27.25"
        y2="19.75"
        href="#a"
    />
    <linearGradient
        id="d"
        x1="13.25"
        x2="22.75"
        y1="26.25"
        y2="16.75"
        href="#a"
    />
    <linearGradient
        id="e"
        x1="16.25"
        x2="27.75"
        y1="25.25"
        y2="13.75"
        href="#a"
    />
    <linearGradient
        id="f"
        x1="19.25"
        x2="32.75"
        y1="24.25"
        y2="10.75"
        href="#a"
    />
    <linearGradient
        id="g"
        x1="4.25"
        x2="7.75"
        y1="29.25"
        y2="25.75"
        href="#a"
    />
    <path fill="url(#b)" d="M2 2h28v28H2z" />
    <path fill="url(#a)" d="M9 21h2v9H9z" />
    <path fill="url(#c)" d="M13 17h2v13h-2z" />
    <path fill="url(#d)" d="M17 13h2v17h-2z" />
    <path fill="url(#e)" d="M21 9h2v21h-2z" />
    <path fill="url(#f)" d="M25 5h2v25h-2z" />
    <path fill="url(#g)" d="M5 25h2v5H5z" />
</svg>