Added One Dark theme (#130)

README.md

@@ -143,5 +143,8 @@ Thank you so much for contributing!!
 * [__Z-Touch__](themes/prism-z-touch.css) (by [Zeel Codder](https://github.com/zeel-codder))<br />
 [![Z-Touch](screenshots/prism-z-touch.png)](themes/prism-z-touch.css)
 
-* [__Solarized Dark Atom__](themes/prism-holi-theme.css) (by [Pranay Chauhan](https://github.com/PranayChauhan2516), based on [Solarized Dark Theme by Atom](https://github.com/atom/solarized-dark-syntax))<br />
-[![Solarized Dark Atom](screenshots/prism-solarized-dark-atom.png)](themes/prism-solarized-dark-atom.css)
+* [__Solarized Dark Atom__](themes/prism-solarized-dark-atom.css) (by [Pranay Chauhan](https://github.com/PranayChauhan2516), based on [Solarized Dark Theme by Atom](https://github.com/atom/solarized-dark-syntax))<br />
+[![Solarized Dark Atom](screenshots/prism-solarized-dark-atom.png)](themes/prism-solarized-dark-atom.css)
+
+* [__One Dark__](themes/prism-one-dark.css) (by [Hoon Wei Ting](https://github.com/hoonweiting), based on [Atom's One Dark Syntax](https://github.com/atom/atom/tree/master/packages/one-dark-syntax))<br />
+[![One Dark](screenshots/prism-one-dark.png)](themes/prism-one-dark.css)

themes/prism-one-dark.css

@@ -0,0 +1,252 @@
+/**
+ * One Dark theme for prism.js
+ * Based on Atom's One Dark theme: https://github.com/atom/atom/tree/master/packages/one-dark-syntax
+ */
+
+/**
+ * One Dark colours in terms of RGB (accurate as of commit 8ae45ca on 6 Sep 2018)
+ * @mono-1: #abb2bf
+ * @mono-2: #828997
+ * @mono-3: #5c6370
+ * @hue-1: #56b6c2 <- cyan
+ * @hue-2: #61afef <- blue
+ * @hue-3: #c678dd <- purple
+ * @hue-4: #98c379 <- green
+ * @hue-5: #e06c75 <- red 1
+ * @hue-5-2: #be5046 <- red 2
+ * @hue-6: #d19a66 <- yellow 1
+ * @hue-6-2: #e5c07b <- yellow 2
+ * @syntax-fg: #abb2bf
+ * @syntax-bg: #282c34
+ * @syntax-gutter: #636d83
+ * @syntax-guide: #abb2bf26
+ * @syntax-accent: #528bff
+ * @syntax-selection-color: #3e4451
+ */
+
+code[class*="language-"],
+pre[class*="language-"] {
+	background: #282c34;
+	color: #abb2bf;
+	text-shadow: 0 1px rgba(0, 0, 0, 0.3);
+	font-family: "Fira Code", "Fira Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
+	direction: ltr;
+	text-align: left;
+	white-space: pre;
+	word-spacing: normal;
+	word-break: normal;
+	line-height: 1.5;
+
+	-moz-tab-size: 2;
+	-o-tab-size: 2;
+	tab-size: 2;
+
+	-webkit-hyphens: none;
+	-moz-hyphens: none;
+	-ms-hyphens: none;
+	hyphens: none;
+}
+
+/* Selection */
+code[class*="language-"]::-moz-selection,
+pre[class*="language-"] *::-moz-selection {
+	background: #3e4451;
+	text-shadow: none;
+}
+
+code[class*="language-"]::selection,
+pre[class*="language-"] *::selection {
+	background: #3e4451;
+	text-shadow: none;
+}
+
+/* Code blocks */
+pre[class*="language-"] {
+	padding: 1em;
+	margin: .5em 0;
+	overflow: auto;
+	border-radius: 0.3em;
+}
+
+/* Inline code */
+:not(pre) > code[class*="language-"] {
+	padding: .2em .3em;
+	border-radius: .3em;
+	white-space: normal;
+}
+
+/* Print */
+@media print {
+	code[class*="language-"],
+	pre[class*="language-"] {
+		text-shadow: none;
+	}
+}
+
+.token.comment,
+.token.prolog,
+.token.cdata {
+	color: #5c6370;
+}
+
+.token.doctype,
+.token.punctuation,
+.token.entity {
+	color: #abb2bf;
+}
+
+.token.attr-name,
+.token.class-name,
+.token.boolean,
+.token.constant,
+.token.number,
+.token.atrule {
+	color: #d19a66;
+}
+
+.token.keyword {
+	color: #c678dd;
+}
+
+.token.property,
+.token.tag,
+.token.symbol,
+.token.deleted,
+.token.important {
+	color: #e06c75;
+}
+
+.token.selector,
+.token.string,
+.token.char,
+.token.builtin,
+.token.inserted,
+.token.regex,
+.token.attr-value,
+.token.attr-value > .token.punctuation {
+	color: #98c379;
+}
+
+.token.variable,
+.token.operator,
+.token.function {
+	color: #61afef;
+}
+
+.token.url {
+	color: #56b6c2;
+	text-decoration: underline;
+}
+
+/* HTML overrides */
+.token.attr-value > .token.punctuation.attr-equals,
+.token.special-attr > .token.attr-value > .token.value.css {
+	color: #abb2bf;
+}
+
+/* CSS overrides */
+.language-css .token.selector {
+	color: #e06c75;
+}
+
+.language-css .token.property {
+	color: #abb2bf;
+}
+
+.language-css .token.url {
+	text-decoration: none;
+}
+
+.language-css .token.function,
+.language-css .token.url > .token.function {
+	color: #56b6c2;
+}
+
+.language-css .token.url > .token.string.url {
+	color: #98c379;
+}
+
+.language-css .token.important,
+.language-css .token.atrule .token.rule {
+	color: #c678dd;
+}
+
+/* JS overrides */
+.language-javascript .token.operator {
+	color: #c678dd;
+}
+
+.language-javascript .token.template-string > .token.interpolation > .token.interpolation-punctuation.punctuation {
+	color: #be5046;
+}
+
+/* JSON overrides */
+.language-json .token.operator {
+	color: #abb2bf;
+}
+
+.language-json .token.null.keyword {
+	color: #d19a66;
+}
+
+/* MD overrides */
+.language-markdown .token.url,
+.language-markdown .token.url > .token.operator,
+.language-markdown .token.url-reference.url > .token.string {
+	color: #abb2bf;
+	text-decoration: none;
+}
+
+.language-markdown .token.url > .token.content {
+	color: #61afef;
+	text-decoration: none;
+}
+
+.language-markdown .token.url > .token.url,
+.language-markdown .token.url-reference.url {
+	color: #56b6c2;
+	text-decoration: underline;
+}
+
+.language-markdown .token.blockquote.punctuation,
+.language-markdown .token.hr.punctuation {
+	color: #5c6370;
+	font-style: italic;
+}
+
+.language-markdown .token.code-snippet {
+	color: #98c379;
+}
+
+.language-markdown .token.bold .token.content {
+	color: #d19a66;
+}
+
+.language-markdown .token.italic .token.content {
+	color: #c678dd;
+}
+
+.language-markdown .token.strike .token.content,
+.language-markdown .token.strike .token.punctuation,
+.language-markdown .token.list.punctuation,
+.language-markdown .token.title.important > .token.punctuation {
+	color: #e06c75;
+}
+
+/* General */
+.token.bold {
+	font-weight: bold;
+}
+
+.token.comment,
+.token.italic {
+	font-style: italic;
+}
+
+.token.entity {
+	cursor: help;
+}
+
+.token.namespace {
+	opacity: .8;
+}