btcpayserver/BTCPayServer/wwwroot/checkout/css/themes/dark.css

/* based on https://github.com/btcpayserver/btcpayserver-doc/blob/master/Theme.md#blockstream */

html {
    background-color: #292929;
}

.modal.page {
    background-color: #292929;
    background-image: linear-gradient(to bottom, #404040, #292929);
}

/* centering for new default design */
.top-header .header__iconcentered {
    display: inline-block;
    vertical-align: middle;
    position: relative;
    width: 100px;
    height: 50px;
    margin: 10px auto 0px;
}

.header__iconcentered__img {
    display: block;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    background: url(dark-logo.svg) no-repeat;
    background-size: 92.5px 40px;
    width: 92.5px;
    height: 40px;
    padding-left: 92.5px; /* Must be equal to width */
}
/* eof */

.top-header {
    background-color: #292929;
}

.invoice {
    background-color: #333333; /* messes up bottom border radius */
}

.expired__body {
    color: #fff;
}

.currency-selection {
    background-color: #15181c;
    border-bottom: 1px solid #565d6e;
    color: #fff;
}

line-items {
    background-color: #111316;
    color: #565d6e !important;
    border-top: 1px solid #565d6e !important;
}

.buyerTotalLine {
    border-top: 1px solid #202224;
    background-color: #15181c;
    color: #fff;
}

.payment-tabs {
    background-color: #15181c;
    color: #fff;
    border-top: 1px solid #565d6e;
}

.payment-tabs__tab.active {
    background-color: #333333;
    color: #fff;
}


canvas {
    border: 5px solid #fff;
}

#prettydropdown-DefaultLang ul {
    color: #565d6e !important;
    background-color: #111316 !important;
}

    #prettydropdown-DefaultLang ul.active li:hover {
        color: #fff !important;
        background-color: #000 !important;
    }

.manual__step-one__header {
    color: #ffffff;
}

.manual__step-one__instructions {
    color: #ffffff;
}

.payment__currencies:hover {
    background: rgba(248, 248, 248,0.1);
}


.content-faded, .manual__step-one__instructions, .manual__step-two__instructions {
    color: #fff;
}


.recommended-fee {
    color: #fff;
}

.powered__by__btcpayserver a {
    color: #51b13e;
}

    .powered__by__btcpayserver a:hover {
        color: #418e32;
    }