diff --git a/app/src/main/java/io/legado/app/constant/AppConst.kt b/app/src/main/java/io/legado/app/constant/AppConst.kt
index 5d4386875..83032ceb4 100644
--- a/app/src/main/java/io/legado/app/constant/AppConst.kt
+++ b/app/src/main/java/io/legado/app/constant/AppConst.kt
@@ -78,13 +78,6 @@ object AppConst {
 
     val sysElevation = appCtx.resources.getDimension(R.dimen.design_appbar_elevation).toInt()
 
-    val darkWebViewJs by lazy {
-        """
-            document.body.style.backgroundColor = "#222222";
-            document.getElementsByTagName('body')[0].style.webkitTextFillColor = '#8a8a8a';
-        """.trimIndent()
-    }
-
     val androidId: String by lazy {
         Settings.System.getString(appCtx.contentResolver, Settings.Secure.ANDROID_ID)
     }
diff --git a/app/src/main/java/io/legado/app/constant/Theme.kt b/app/src/main/java/io/legado/app/constant/Theme.kt
index 8145f4d01..f83474b69 100644
--- a/app/src/main/java/io/legado/app/constant/Theme.kt
+++ b/app/src/main/java/io/legado/app/constant/Theme.kt
@@ -13,7 +13,8 @@ enum class Theme {
             else -> Light
         }
 
-        fun getTheme(backgroundColor: Int) =
+        @Suppress("unused")
+        fun fromBackground(backgroundColor: Int) =
             if (ColorUtils.isColorLight(backgroundColor)) Light
             else Dark