diff --git a/browser/finder/index.js b/browser/finder/index.js
index cda861d4..30ef1403 100644
--- a/browser/finder/index.js
+++ b/browser/finder/index.js
@@ -9,11 +9,24 @@ import FinderDetail from './FinderDetail'
 import actions, { selectArticle, searchArticle } from './actions'
 import _ from 'lodash'
 import dataStore from 'browser/lib/dataStore'
-
+import fetchConfig from '../lib/fetchConfig'
 const electron = require('electron')
 const { clipboard, ipcRenderer, remote } = electron
 const path = require('path')
 
+let config = fetchConfig()
+applyConfig(config)
+
+ipcRenderer.on('config-apply', function (e, newConfig) {
+  config = newConfig
+  applyConfig(config)
+})
+
+function applyConfig(){
+  let body = document.body
+  body.setAttribute('data-theme', config['theme-ui'])
+}
+
 if (process.env.NODE_ENV !== 'production') {
   window.addEventListener('keydown', function (e) {
     if (e.keyCode === 73 && e.metaKey && e.altKey) {
diff --git a/browser/lib/fetchConfig.js b/browser/lib/fetchConfig.js
index 0a8397df..54b6eaf5 100644
--- a/browser/lib/fetchConfig.js
+++ b/browser/lib/fetchConfig.js
@@ -14,6 +14,7 @@ const defaultConfig = {
   'preview-font-family': 'Lato',
   'switch-preview': 'blur',
   'disable-direct-write': false,
+  'theme-ui': 'light',
   'theme-syntax': 'xcode'
 }
 
diff --git a/browser/main/index.js b/browser/main/index.js
index 96cb5edb..59649afb 100644
--- a/browser/main/index.js
+++ b/browser/main/index.js
@@ -7,11 +7,25 @@ require('../styles/main/index.styl')
 import { openModal } from 'browser/lib/modal'
 import OSSAnnounceModal from './modal/OSSAnnounceModal'
 import activityRecord from 'browser/lib/activityRecord'
+import fetchConfig from '../lib/fetchConfig'
 const electron = require('electron')
 const ipc = electron.ipcRenderer
 const path = require('path')
 const remote = electron.remote
 
+let config = fetchConfig()
+applyConfig(config)
+
+ipc.on('config-apply', function (e, newConfig) {
+  config = newConfig
+  applyConfig(config)
+})
+
+function applyConfig(config) {
+  let body = document.body
+  body.setAttribute('data-theme', config['theme-ui'])
+}
+
 if (process.env.NODE_ENV !== 'production') {
   window.addEventListener('keydown', function (e) {
     if (e.keyCode === 73 && e.metaKey && e.altKey) {
diff --git a/browser/main/modal/Preference/AppSettingTab.js b/browser/main/modal/Preference/AppSettingTab.js
index 305495a5..fe7665f6 100644
--- a/browser/main/modal/Preference/AppSettingTab.js
+++ b/browser/main/modal/Preference/AppSettingTab.js
@@ -182,6 +182,13 @@ export default class AppSettingTab extends React.Component {
             : null
           }
           <div className='sectionTitle'>Theme</div>
+          <div className='sectionSelect'>
+            <label>UI Theme</label>
+            <select valueLink={this.linkState('config.theme-ui')}>
+              <option value='light'>Light</option>
+              <option value='dark'>Dark</option>
+            </select>
+          </div>
           <div className='sectionSelect'>
             <label>Syntax Theme</label>
             <select valueLink={this.linkState('config.theme-syntax')}>
diff --git a/browser/styles/finder/index.styl b/browser/styles/finder/index.styl
index cd48aa69..4528918c 100644
--- a/browser/styles/finder/index.styl
+++ b/browser/styles/finder/index.styl
@@ -3,6 +3,7 @@
 @import '../mixins/*'
 global-reset()
 @import '../shared/*'
+@import './theme/*'
 
 iptBgColor = #E6E6E6
 iptFocusBorderColor = #369DCD
diff --git a/browser/styles/main/index.styl b/browser/styles/main/index.styl
index 69bce492..e7d9a65f 100644
--- a/browser/styles/main/index.styl
+++ b/browser/styles/main/index.styl
@@ -8,6 +8,7 @@ global-reset()
 @import './ArticleList'
 @import './ArticleDetail'
 @import './modal/*'
+@import './theme/*'
 
 DEFAULT_FONTS = 'Lato', helvetica, arial, sans-serif
 
diff --git a/browser/styles/main/modal/CreateNewFolder.styl b/browser/styles/main/modal/CreateNewFolder.styl
index af3ec002..1d7870d2 100644
--- a/browser/styles/main/modal/CreateNewFolder.styl
+++ b/browser/styles/main/modal/CreateNewFolder.styl
@@ -72,7 +72,7 @@ iptFocusBorderColor = #369DCD
   .confirmBtn
     display block
     position absolute
-    left 180px
+    left 205px
     bottom 44px
     width 240px
     font-size 24px
diff --git a/browser/styles/theme/dark.styl b/browser/styles/theme/dark.styl
new file mode 100644
index 00000000..00c1b395
--- /dev/null
+++ b/browser/styles/theme/dark.styl
@@ -0,0 +1,396 @@
+@import '../vars'
+
+themeDarkBackground = lighten(#212327, 5%)
+themeDarkModal = lighten(themeDarkBackground, 0%)
+themeDarkList = darken(themeDarkBackground, 25%)
+themeDarkPreview = #181818
+themeDarkSidebar = darken(themeDarkBackground, 45%)
+themeDarkText = #DDDDDD
+themeDarkBorder = lighten(themeDarkBackground, 20%)
+themeDarkTopicColor = #369dcd
+themeDarkTooltip = rgba(0, 0, 0, 0.7)
+themeDarkFocusText = #FFFFFF
+themeDarkFocusButton = lighten(themeDarkTopicColor, 30%)
+themeDarkBoxShadow = alpha(lighten(themeDarkTopicColor, 10%), 0.4);
+
+body[data-theme="dark"]
+  .Main
+    .ArticleNavigator .userInfo .settingBtn .tooltip,
+    .ArticleNavigator .ArticleNavigator-folders .ArticleNavigator-folders-header .addBtn .tooltip,
+    .ArticleTopBar>.ArticleTopBar-left>.ArticleTopBar-left-search .tooltip,
+    .ArticleTopBar>.ArticleTopBar-left .ArticleTopBar-left-control button.ArticleTopBar-left-control-new-post-button .tooltip
+    .ArticleTopBar>.ArticleTopBar-right>button .tooltip,
+    .ArticleTopBar>.ArticleTopBar-right>.ArticleTopBar-right-links-button-dropdown,
+    .ArticleDetail .ArticleDetail-info .ArticleDetail-info-control>button .tooltip,
+    .ArticleDetail .ArticleDetail-info .ArticleDetail-info-control .ShareButton-open-button .tooltip {
+      background-color themeDarkTooltip
+    }
+
+    .ArticleNavigator
+      border-color lighten(themeDarkBorder, 10%)
+      background-color themeDarkSidebar
+
+      .userInfo
+        border-color themeDarkBorder
+
+        .userName
+          color themeDarkText
+
+      .ArticleNavigator-folders
+        border-color lighten(themeDarkBorder, 10%)
+        background-color themeDarkSidebar
+
+        .ArticleNavigator-folders-header
+          border-color themeDarkBorder
+
+          .title
+            color themeDarkText
+
+        .folderList,
+        .folderList>button
+          color themeDarkText
+
+        .folderList>button
+          transition 0.1s
+
+          &:hover
+            background-color lighten(themeDarkSidebar, 10%)
+
+          &.active,
+          $:active
+            background-color darken(brandColor, 15%)
+
+      .userInfo .settingBtn,
+      .ArticleNavigator-folders .ArticleNavigator-folders-header .addBtn
+        transition 0.1s
+        color themeDarkText
+        border none
+        background-color lighten(themeDarkBackground, 10%)
+
+      .userInfo .settingBtn:hover,
+      .ArticleNavigator-folders .ArticleNavigator-folders-header .addBtn:hover
+        background-color themeDarkTopicColor
+
+      .userInfo .settingBtn:focus,
+      .ArticleNavigator-folders .ArticleNavigator-folders-header .addBtn:focus
+        background-color darken(themeDarkTopicColor, 20%)
+
+    .ArticleTopBar
+      color themeDarkText
+      background-color themeDarkBackground
+
+      .ArticleTopBar-left
+        .ArticleTopBar-left-search input
+          color themeDarkText
+          background-color lighten(themeDarkBackground, 10%)
+
+        .ArticleTopBar-left-control button.ArticleTopBar-left-control-new-post-button
+          color themeDarkText
+          background-color lighten(themeDarkBackground, 10%)
+
+          &:hover
+            color themeDarkText
+            background-color themeDarkTopicColor
+
+          &:focus
+            color themeDarkText
+            background-color darken(themeDarkTopicColor, 20%)
+
+      .ArticleTopBar-right
+        &>button
+          color themeDarkText
+          border none
+          background-color lighten(themeDarkBackground, 10%)
+
+          &:hover
+            color themeDarkText
+            background-color themeDarkTopicColor
+
+          &:focus
+            color themeDarkText
+            background-color darken(themeDarkTopicColor, 20%)
+
+    .ArticleList
+      color themeDarkText
+      border-color themeDarkBorder
+      background-color themeDarkList
+
+      .ArticleList-item
+        color themeDarkText
+        background-color themeDarkList
+
+        &:hover
+          background-color lighten(themeDarkList, 5%)
+
+      .divider
+        border-color themeDarkBorder
+
+    .ArticleDetail
+      color themeDarkText
+      border-color themeDarkBorder
+      background-color themeDarkBackground
+
+      .ArticleDetail-info
+        .ArticleDetail-info-folder
+          color themeDarkText
+          background-color lighten(themeDarkBackground, 10%)
+
+        .ArticleDetail-info-row2 .TagSelect .TagSelect-tags
+          border-color themeDarkBorder
+          background-color themeDarkBackground
+
+          input
+            color themeDarkText
+
+        .ArticleDetail-info-control
+          &>button,
+          & .ShareButton-open-button
+            transition 0.1s
+            color themeDarkText
+            border none
+            background-color lighten(themeDarkBackground, 10%)
+
+          &>button:hover,
+          & .ShareButton-open-button:hover
+            background-color themeDarkTopicColor
+
+          &>button:focus,
+          & .ShareButton-open-button:focus
+            background-color darken(themeDarkTopicColor, 20%)
+
+          & .ShareButton-dropdown
+            color themeDarkText
+            box-shadow 0px 0px 10px 1px themeDarkBoxShadow;
+            border 1px solid themeDarkBorder;
+            background-color themeDarkBackground
+
+          & .ShareButton-dropdown>button
+            color themeDarkText
+
+            &:hover
+              background-color darken(themeDarkTopicColor, 20%)
+
+      .ArticleDetail-panel
+        border-color themeDarkBackground
+
+        .ArticleDetail-panel-header,
+        .ArticleDetail-panel-header .ArticleDetail-panel-header-title input
+          color themeDarkText
+          border-color themeDarkBorder
+          background-color themeDarkPreview
+
+        .ArticleEditor
+          .CodeEditor
+            border-color themeDarkBorder
+
+        &>.ArticleDetail-panel-header .ArticleDetail-panel-header-mode
+          transition 0.1s
+          color themeDarkText
+          background-color lighten(themeDarkBackground, 10%)
+
+          input
+            color themeDarkText
+
+          &.idle
+            border-color themeDarkBorder
+            background-color themeDarkPreview
+
+          &.idle:hover
+            background-color themeDarkTopicColor
+
+          &.edit .ModeSelect-options
+            color themeDarkText
+            border-color themeDarkBackground
+            background-color themeDarkBackground
+
+            .ModeSelect-options-item
+              &:hover
+                color lighten(themeDarkText, 100%)
+                background-color darken(themeDarkTopicColor, 20%)
+
+  .ModalBase
+    .modal
+      color themeDarkText
+      background-color themeDarkModal
+      box-shadow 0px 0px 10px 1px themeDarkBoxShadow;
+
+      input
+        color themeDarkText
+        border-color lighten(themeDarkBackground, 10%)
+        background-color lighten(themeDarkBackground, 10%)
+
+        &:hover
+          border-color themeDarkBorder
+
+        &:focus
+          border-color themeDarkTopicColor
+
+      button
+        &:hover
+          background-color lighten(themeDarkBackground, 10%)
+
+    .CreateNewFolder.modal
+      .closeBtn
+        transition 0.1s
+        border-radius 24px
+        color themeDarkText
+
+        &:hover
+          background-color darken(#BF360C, 10%)
+
+      .confirmBtn
+        background-color darken(brandColor, 10%)
+
+        &:hover
+          background-color brandColor
+
+    .Preferences.modal
+      .sectionInput input,
+      .sectionSelect select
+      .sectionMultiSelect .sectionMultiSelect-input select
+        color themeDarkText
+        border-color lighten(themeDarkBackground, 10%)
+        background-color lighten(themeDarkBackground, 10%)
+
+        &:hover
+          border-color themeDarkBorder
+
+        &:focus
+          border-color themeDarkTopicColor
+
+      .header
+        border-color themeDarkBorder
+        background-color darken(themeDarkModal, 40%)
+
+      .nav
+        border-color themeDarkBorder
+        background-color darken(themeDarkModal, 20%)
+
+        &>button
+          &:hover
+            color themeDarkFocusText
+            background-color lighten(themeDarkModal, 10%)
+
+          &.active,
+          &:active
+            background-color darken(brandColor, 15%)
+
+      .section
+        border-color themeDarkBorder
+
+      &>.content
+        &.AppSettingTab
+          .description
+            code
+              color themeDarkText
+              border-color darken(themeDarkBorder, 10%)
+              background-color lighten(themeDarkPreview, 5%)
+
+        &.FolderSettingTab
+          .folderTable
+            &>div
+              border-color themeDarkBorder
+
+              &:last-child
+                border-color transparent
+
+            &>div.FolderRow
+              .sortBtns button
+                transition 0.1s
+                color themeDarkText
+
+                &:hover
+                  color themeDarkFocusButton
+
+              .folderColor
+                &>button,
+                .options
+                  color themeDarkText
+                  border-color themeDarkBorder
+
+                &>button
+                  border-color lighten(themeDarkBackground, 10%)
+                  background-color lighten(themeDarkBackground, 10%)
+
+                  &:hover
+                    border-color themeDarkBorder
+
+                  &:focus
+                    border-color themeDarkTopicColor
+
+                .options
+                  background-color themeDarkBackground
+
+            &>div.FolderRow .folderName input,
+            &>div.newFolder .folderName input
+                color themeDarkText
+                border-color lighten(themeDarkBackground, 10%)
+                background-color lighten(themeDarkBackground, 10%)
+
+                &:hover
+                  border-color themeDarkBorder
+
+                &:focus
+                  border-color themeDarkTopicColor
+
+            .folderControl
+              button
+                transition 0.1s
+                color themeDarkText
+
+                &:hover
+                  color themeDarkFocusButton
+
+  .Finder
+    .FinderInput
+      color themeDarkText
+      border-color themeDarkBorder
+      background-color themeDarkBackground
+
+      input
+        color themeDarkText
+        border-color lighten(themeDarkBackground, 10%)
+        background-color lighten(themeDarkBackground, 10%)
+
+        &:focus
+          border-color themeDarkTopicColor
+
+    .FinderList
+      color themeDarkText
+      border-color themeDarkBorder
+      background-color themeDarkList
+
+      .divider
+        border-color themeDarkBorder
+
+    .FinderDetail
+      color themeDarkText
+      border-color themeDarkBorder
+      background-color themeDarkPreview
+      box-shadow 0px 0px 10px 0 darken(themeDarkBorder, 20%);
+
+      .header
+        border-color themeDarkBorder
+
+        .right
+          .clipboardBtn
+            transition 0.1s
+
+            &:hover
+              color themeDarkFocusButton
+
+            .tooltip
+              background-color themeDarkTooltip
+
+  // Markdown Preview
+  .Finder .FinderDetail .content,
+  .ArticleDetail .ArticleDetail-panel .ArticleEditor
+    .MarkdownPreview
+      color themeDarkText
+      border-color themeDarkBorder
+      background-color themeDarkPreview
+
+      pre,
+      code
+        color themeDarkText
+        background-color themeDarkPreview
diff --git a/lib/config.js b/lib/config.js
index acabb023..10eeb270 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -13,6 +13,7 @@ const defaultConfig = {
   'preview-font-family': 'Lato',
   'switch-preview': 'blur',
   'disable-direct-write': false,
+  'theme-ui': 'light',
   'theme-syntax': 'xcode'
 }
 const configFile = 'config.json'