style.css

div.content-wrapper {
    background: #31383F;
}

#dashboard > div.menu {
    background: #24292E;
}

#header > div {
    background: #31383F;
}

#header > div > div > div.container_hdYJnHC3eW > form > input {
    background: #121212;
    border-color: #121212;
}


#course > div.menu {
    background: #24292E;
}

#course > div.content-wrapper > div > div.header-second {
    background: #2D333A;
}

#course > div.content-wrapper > div.course-container.tex2jax_ignore.category-color.category-cat-default > div.header-second > div > ul > li:nth-child(2) > a {
    color: #fff;
    background: #121212;
}

.course-component {
    background-color: #24292E !important;
    border-color: #121212;
}

h1, h2, h3, h4, h5, li, p, a {
    color: #fff !important;
}

#course-content {
    background: #24292E;
}

#content > div.container > div {
    background: #31383F;
}

.content-wrapper .container .course-wrapper .course-index #accordion .chapter ul {
    background: #121212;
}

#accordion > nav > div {
    background: #121212 !important;
}

.content-wrapper .container .course-wrapper .course-index #accordion .chapter ul {
    background: #31383F !important;
}

.content-wrapper .container .course-wrapper .course-index #accordion .chapter ul li a {
    background-color: #24292E !important;
}

#seq_content > div > div > div > div > h3 > em > span {
    color: #BB86FC !important;
}

#seq_content > div > div > div > div > p > span {
    color: #BB86FC !important;
}

#seq_content > div > div > div > div > h3 > span > em {
    color: #BB86FC !important;
}

#seq_content > div > div > div > div > blockquote > ul > li > span {
    color: #BB86FC !important;
}

.MathJax {
    color: green !important;
}