diff --git a/README.md b/README.md
index 2109ad0..4b488cb 100644
--- a/README.md
+++ b/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))
[![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))
-[![Solarized Dark Atom](screenshots/prism-solarized-dark-atom.png)](themes/prism-solarized-dark-atom.css)
\ No newline at end of file
+* [__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))
+[![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))
+[![One Dark](screenshots/prism-one-dark.png)](themes/prism-one-dark.css)
diff --git a/screenshots/prism-one-dark.png b/screenshots/prism-one-dark.png
new file mode 100644
index 0000000..57a2e18
Binary files /dev/null and b/screenshots/prism-one-dark.png differ
diff --git a/themes/prism-one-dark.css b/themes/prism-one-dark.css
new file mode 100644
index 0000000..70f48d3
--- /dev/null
+++ b/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;
+}