Just Read Custom Theme

dark-gray-theme.css

@import 'https://fonts.googleapis.com/css?family=Open+Sans';

* {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.75em;
    font-size: 18px;
    background-color: #222;
    color: rgba(255, 255, 255, 0.7);
}

.simple-container {
    max-width: 800px;
    margin: 30px auto;
    background-color: rgb(90, 90, 92);
    padding: 30px 40px 10px 40px;
    box-shadow: rgba(0, 0, 0, 0.239216) 0px 6px 12px 3px;
}

.simple-print {
    fill: white;
    stroke: white;
}

.simple-print svg {
    height: 100%;
}

.simple-close {
    color: white;
    border-color: white;
}

.simple-ext-info {
    border-top: 1px solid #aaa;
}

p {
    font-size: 18px;
}

h1 {
    font-size: 28px;
    line-height: 36px;
}

h2 {
    font-size: 20px;
    line-height: 28px;
}

h3 {
    font-size: 18px;
    line-height: 25px;
    padding-top: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #D8D8D8;
    border-top: 1px solid #D8D8D8;
}

hr {
    height: 1px;
    background-color: #d8d8d8;
    border: none;
    width: 100%;
    margin: 0px;
}

a[href] {
    color: rgba(84, 190, 255, 0.95);
    text-decoration: none;
}

a[href]:hover {
    color: rgba(133, 208, 255, 0.95);
}

img {
    max-width: 100%;
}

li {
    line-height: 1.5em;
}

aside,
[class *= "sidebar"],
[id *= "sidebar"] {
    max-width: 90%;
    margin: 0 auto;
    border: 1px solid lightgrey;
    padding: 5px 15px;
}

@media (min-width: 1921px) {
    body {
        font-size: 22px;
    }
}

@media print {
    .simple-container {
        box-shadow: none;
    }
}

I just started looking for a Chrome extension because of how much I missed Safari Reader View. This is perfect. Thank you!