diff --git a/eruda.d.ts b/eruda.d.ts
index 911007c99..f32ec7dae 100644
--- a/eruda.d.ts
+++ b/eruda.d.ts
@@ -50,7 +50,7 @@ declare module 'eruda' {
 
   /**
    * Eruda Plugin
-   * @see https://github.com/liriliri/eruda/blob/master/doc/PLUGIN.md
+   * @see https://eruda.liriliri.io/docs/plugin.html
    */
   export interface Tool {
     /**
@@ -389,16 +389,18 @@ declare module 'eruda' {
 
   /**
    * Eruda Util
-   * @see https://github.com/liriliri/eruda/blob/master/doc/UTIL_API.md
+   * @see https://eruda.liriliri.io/docs/plugin.html#utility
    */
   export interface Util {
     evalCss(css: string): HTMLStyleElement
     isErudaEl(val: any): boolean
+    isDarkTheme(theme?: string): boolean
+    getTheme(): string
   }
 
   /**
    * Eruda APIs
-   * @see https://github.com/liriliri/eruda/blob/master/doc/API.md
+   * @see https://eruda.liriliri.io/docs/api.html
    */
   export interface ErudaApis {
     /**
diff --git a/src/eruda.js b/src/eruda.js
index dacaf8503..a2dadf119 100644
--- a/src/eruda.js
+++ b/src/eruda.js
@@ -12,9 +12,12 @@ import Settings from './Settings/Settings'
 import emitter from './lib/emitter'
 import logger from './lib/logger'
 import * as util from './lib/util'
+import { isDarkTheme } from './lib/themes'
+import themes from './lib/themes'
 import isFn from 'licia/isFn'
 import isNum from 'licia/isNum'
 import isObj from 'licia/isObj'
+import each from 'licia/each'
 import isMobile from 'licia/isMobile'
 import viewportScale from 'licia/viewportScale'
 import detectBrowser from 'licia/detectBrowser'
@@ -22,6 +25,7 @@ import $ from 'licia/$'
 import toArr from 'licia/toArr'
 import upperFirst from 'licia/upperFirst'
 import nextTick from 'licia/nextTick'
+import isEqual from 'licia/isEqual'
 import extend from 'licia/extend'
 import evalCss from './lib/evalCss'
 import chobitsu from './lib/chobitsu'
@@ -51,7 +55,28 @@ export default {
   },
   _isInit: false,
   version: VERSION,
-  util,
+  util: {
+    isErudaEl: util.isErudaEl,
+    evalCss,
+    isDarkTheme(theme) {
+      if (!theme) {
+        theme = this.getTheme()
+      }
+      return isDarkTheme(theme)
+    },
+    getTheme: () => {
+      const curTheme = evalCss.getCurTheme()
+
+      let result = 'Light'
+      each(themes, (theme, name) => {
+        if (isEqual(theme, curTheme)) {
+          result = name
+        }
+      })
+
+      return result
+    },
+  },
   chobitsu,
   Tool,
   Console,
diff --git a/src/lib/themes.js b/src/lib/themes.js
index bccd41553..c0aa4693d 100644
--- a/src/lib/themes.js
+++ b/src/lib/themes.js
@@ -228,7 +228,7 @@ export default {
     '#994cc3', '#aa0982', '#7d818b', '#994cc3', '#546e7a',
     '#994cc3', '#4876d6', '#4876d6', '#637777',
   ]),
-  'AMOLED': createDarkTheme([
+  AMOLED: createDarkTheme([
     '#000000', '#8F93A2', '#FFFFFF', '#68FFAE', '#000000',
     '#41465b', '#4B526D', '#000000', '#DEFDF7', '#9CFFCF',
     '#D596FF', '#A76DF7', '#9FC5FF', '#86F3C7', '#8F93A2',
diff --git a/src/lib/util.js b/src/lib/util.js
index 50f882c03..e0a2efb54 100644
--- a/src/lib/util.js
+++ b/src/lib/util.js
@@ -9,7 +9,6 @@ import root from 'licia/root'
 import toNum from 'licia/toNum'
 import trim from 'licia/trim'
 import html from 'licia/html'
-import evalCssUtil from './evalCss'
 
 // https://stackoverflow.com/questions/46318395/detecting-mobile-device-notch
 export function hasSafeArea() {
@@ -108,8 +107,6 @@ export function isChobitsuEl(el) {
   return false
 }
 
-export const evalCss = evalCssUtil
-
 export function classPrefix(str) {
   if (/<[^>]*>/g.test(str)) {
     try {