An edit of https://github.com/isagalaev/highlight.js/blob/master/src/styles/tomorrow-night-eighties.css for styling code tags that are not necessarily within a pre tag, useful for inline code highlighting.

tomorrow-night-eighties.css

/* Tomorrow Night Eighties Theme */
/* Original theme - https://github.com/chriskempson/tomorrow-theme */
/* http://jmblog.github.com/color-themes-for-google-code-highlightjs */
/* Edited by Ayman Farhat(http://aymanfarhat.com) for supporting inline code tags without pre */
.tomorrow-comment, code .comment, code .title {
  color: #999999;
}

.tomorrow-red, code .variable, code .attribute, code .tag, code .regexp, code .ruby .constant, code .xml .tag .title, code .xml .pi, code .xml .doctype, code .html .doctype, code .css .id, code .css .class, code .css .pseudo {
  color: #f2777a;
}

.tomorrow-orange, code .number, code .codeprocessor, code .built_in, code .literal, code .params, code .constant {
  color: #f99157;
}

.tomorrow-yellow, code .ruby .class .title, code .css .rules .attribute {
  color: #ffcc66;
}

.tomorrow-green, code .string, code .value, code .inheritance, code .header, code .ruby .symbol, code .xml .cdata {
  color: #99cc99;
}

.tomorrow-aqua, code .css .hexcolor {
  color: #66cccc;
}

.tomorrow-blue, code .function, code .python .decorator, code .python .title, code .ruby .function .title, code .ruby .title .keyword, code .perl .sub, code .javascript .title, code .coffeescript .title {
  color: #6699cc;
}

.tomorrow-purple, code .keyword, code .javascript .function {
  color: #cc99cc;
}

pre code {
  display: block;
  padding: 0.5em;
}

code {
  background: #2d2d2d;
  color: #cccccc;
  padding: 0.3em;
}

code.coffeescript .javascript,
code.javascript .xml,
code.tex .formula,
code.xml .javascript,
code.xml .vbscript,
code.xml .css,
code.xml .cdata {
  opacity: 0.5;
}