CSS replacement theme for 4Chan. Requires a browser addon that automatically loads custom CSS on page load, like Stylebot for Chrome.

4Chan Solarized

html, body {
    background: none;
    background-color: #002b36 ;
}

blockquote.postMessage, .teaser {
    color: #93a1a1;
}

div.post div.postInfo span.subject {
    color: #86b404;
}

span.quote {
    color: #b58900;
}

span.name {
    color: #2aa198;
}

strong.capcode.hand.id_mod {
    color: #d33682;
}

td.blotter-date {
    color: #93a1a1;
}

td.blotter-content {
    color: #93a1a1;
}

td.blotter-content a {
    color: #268bd2;
}

a.aplnk {
    color: #268bd2;
}

div.boardBanner {
    background-color: #002b36;
}

span.boardList {
    background-color: #002b36;
}

div#boardNavDesktop a, div#boardNavDesktopFoot a, .button {
    color: #268bd2;
}

div.boardTitle {
    background-color: #002b36;
    color: #d33682;
}

div.desktop a {
    color: #268bd2;
}

span.dateTime {
    color: #93a1a1;
}

div.fileText {
    color: #93a1a1;
}

div.fileText a {
    color: #268bd2;
}

body.is_index.board_g.yotsuba_b_new.ws {
    background-color: #002b36;
}

div.center div {
    color: #93a1a1;
    background-color: #002b36;
}

hr {
    border: 1px solid #586e75;
    border-bottom: none;
}

hr.abovePostForm {
    color: #fdf6e3;
}

body.is_index.board_g.yotsuba_b_new.ws hr {
    color: #fdf6e3;
}

div.navLinks.desktop, div#boardNavDesktop, div#boardNavDesktopFoot, .btn-wrap, .deleteform, .stylechanger, #styleSwitcher, #settings, #togglePostFormLink {
    color: #6c71c4;
}

div.post.reply {
    background-color: #073642;
    border: 1px solid #15414c;
    border-left: none;
    border-top: none;
}

.reply:target, .reply.highlight, #quote-preview {
    background-color: #174652 !important;
    border: 1px solid #15414c !important;
    border-left: none;
    border-top: none;
}

div.pagelist.desktop {
    background-color: #002b36;
}

span.absBotDisclaimer {
    color: #586e75;
}

#navtopright {
    background-color: #002b36;
}

#toggleBlotter {
    color: #D33682;
}

td span a {
    color: #d33682;
}

tfoot tr td {
    color: #cb4b16;
}

div.boardSubtitle {
    color: #dc322f;
}

#search-box {
    background-color: #fdf6e3;
}

pre.prettyprint.prettyprinted {
    background-color: #fdf6e3;
}

span.pln {
    color: #586e75;
}

span.typ {
    color: #268bd2;
}

span.pun {
    color: #b58900;
}

span.str {
    color: #859900;
}

span.kwd {
    color: #cb4b16;
}

span.lit {
    color: #2aa198;
}

span.tag {
    color: #268bd2;
}

span.atn {
    color: #2aa198;
}

span.postertrip {
    color: #859900;
}

span.com {
    color: #b58900;
}

a.replylink {
    color: #2aa198;
}

.burichan_new .backlink a, .yotsuba_b_new .backlink a {
    color: #ffbf00 !important;
}

div.post div.postInfo span.postNum a {
    color: #8a084b;
}

.meta {
    color: #fff;
}

div.sideArrows {
    color: #bfff00;
}