diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2b06584..1d650f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,16 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+### [0.1.16](https://github.com/LiHowe/vuepress-plugin-mermaid/compare/v0.1.15...v0.1.16) (2023-01-16)
+
+### [0.1.15](https://github.com/LiHowe/vuepress-plugin-mermaid/compare/v0.1.14...v0.1.15) (2023-01-13)
+
+
+### Features
+
+* preset theme:ocean [wip] ([4c69bae](https://github.com/LiHowe/vuepress-plugin-mermaid/commit/4c69bae9f6ad97d1806ea26127c65f9e52c92245))
+* preset themes ([c2fc4bb](https://github.com/LiHowe/vuepress-plugin-mermaid/commit/c2fc4bb77a27c24bc690e4e3101f0e8a2d91b226))
+
 ### [0.1.14](https://github.com/LiHowe/vuepress-plugin-mermaid/compare/v0.1.13...v0.1.14) (2023-01-12)
 
 ### [0.1.13-beta.0](https://github.com/LiHowe/vuepress-plugin-mermaid/compare/v0.1.10...v0.1.13) (2023-01-12)
diff --git a/README.md b/README.md
index 8d9d3ab..6b4f903 100644
--- a/README.md
+++ b/README.md
@@ -53,12 +53,13 @@ Mermaid 完整的配置字段可以查看 [Mermaid - Configuration](https://merm
 
 + `Themes.sky`: 浅蓝色调
 ![浅蓝色主题](https://s2.loli.net/2023/01/13/e8Y3Rqu4KowCjN6.png)
-+ `Themes.ocean`: 深蓝色调
 
 #### 暗黑主题
 
 + `Themes.brown`
 ![棕色主题](https://s2.loli.net/2023/01/13/NGYc2A4e7BytmOR.png)
++ `Themes.plain`
+![朴素主题](https://s2.loli.net/2023/01/16/XTPdMQw96qRnEfs.png)
 
 #### 自定义主题
 
diff --git a/README_EN.md b/README_EN.md
index 52d2df3..95059a9 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -48,13 +48,14 @@ Except Mermaid built-in theme, the plugin add some additional themes like:
 #### Light Mode Themes
 
 + `Themes.sky`: light blue
-![浅蓝色主题](https://s2.loli.net/2023/01/13/e8Y3Rqu4KowCjN6.png)
-+ `Themes.ocean`: dark blue
+![light blue](https://s2.loli.net/2023/01/13/e8Y3Rqu4KowCjN6.png)
 
 #### Dark Mode Themes
 
 + `Themes.brown`
-![brown themes](https://s2.loli.net/2023/01/13/NGYc2A4e7BytmOR.png)
+![brown theme](https://s2.loli.net/2023/01/13/NGYc2A4e7BytmOR.png)
++ `Themes.plain`
+![Plain theme](https://s2.loli.net/2023/01/16/XTPdMQw96qRnEfs.png)
 
 #### Theme customization
 
diff --git a/docs/.vuepress/config.ts b/docs/.vuepress/config.ts
index 260e04e..9664c0d 100644
--- a/docs/.vuepress/config.ts
+++ b/docs/.vuepress/config.ts
@@ -1,30 +1,33 @@
 import { MermaidPlugin, Themes, registerTheme } from '../../lib/node'
 
 const cc = registerTheme('fire', {
-  background: '#EFF5F5',
+  background: '#393E46',
   fontSize: '14px',
-  primaryColor: '#EFF5F5',
-  noteBkgColor: '#497174',
-  noteTextColor: '#333',
-  darkMode: true,
-  lineColor: '#EB6440',
-  primaryBorderColor: '#D6E4E5',
-  primaryTextColor: '#497174',
-  git0: '#D6E4E5',
-  git1: '#D6E4E5',
-  git2: '#D6E4E5',
-  git3: '#D6E4E5',
-  git4: '#D6E4E5',
-  git5: '#D6E4E5',
-  git6: '#D6E4E5',
-  git7: '#D6E4E5',
+  primaryColor: '#393E46',
+  // noteBkgColor: '#00ADB5',
+  noteTextColor: '#393E46',
+  darkMode: false,
+  lineColor: '#EEEEEE',
+  actorBorder: '#EEEEEE',
+  primaryTextColor: '#EEEEEE',
+  attributeBackgroundColorOdd: '#43484e',
+  attributeBackgroundColorEven: '#393E46'
+  // primaryBorderColor: '#EEEEEE',
+  // git0: '#D6E4E5',
+  // git1: '#D6E4E5',
+  // git2: '#D6E4E5',
+  // git3: '#D6E4E5',
+  // git4: '#D6E4E5',
+  // git5: '#D6E4E5',
+  // git6: '#D6E4E5',
+  // git7: '#D6E4E5',
 })
 
 export default {
   plugins: [
     MermaidPlugin({
       theme: cc,
-      darkTheme: cc,
+      darkTheme: Themes.ocean,
     })
   ]
 }
diff --git a/package.json b/package.json
index 8fc3b3b..13170a1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vuepress-plugin-mermaid-next",
-  "version": "0.1.14",
+  "version": "0.1.16",
   "description": "A Mermaid plugin for vuepress-next",
   "main": "./lib/node/index.js",
   "directories": {
diff --git a/src/shared/theme/index.ts b/src/shared/theme/index.ts
index e7d3488..b66a2f0 100644
--- a/src/shared/theme/index.ts
+++ b/src/shared/theme/index.ts
@@ -8,9 +8,9 @@ enum Themes {
   base = 'base',
   null = 'null',
 
-  ocean = 'ocean',
   sky = 'sky',
   brown = 'brown',
+  plain = 'plain',
 }
 
 const builtinTheme: Themes[] = [
@@ -106,17 +106,7 @@ _registerTheme(Themes.sky, {
   darkMode: false,
 })
 
-// [light] - ocean
-_registerTheme(Themes.ocean, {
-  background: '#e3f2fd',
-  fontSize: '14px',
-  primaryColor: '#e3f2fd',
-  noteBkgColor: '#fffada',
-  noteTextColor: '#333',
-  darkMode: false,
-})
-
-// [dark] - charcoal
+// [dark] - brown
 _registerTheme(Themes.brown, {
   background: '#1A120B',
   fontSize: '14px',
@@ -130,6 +120,20 @@ _registerTheme(Themes.brown, {
   attributeBackgroundColorEven: '#3C2A21'
 })
 
+// [dark] - plain
+_registerTheme(Themes.plain, {
+  background: '#393E46',
+  fontSize: '14px',
+  primaryColor: '#393E46',
+  noteTextColor: '#393E46',
+  darkMode: false,
+  lineColor: '#EEEEEE',
+  actorBorder: '#EEEEEE',
+  primaryTextColor: '#EEEEEE',
+  attributeBackgroundColorOdd: '#43484e',
+  attributeBackgroundColorEven: '#393E46'
+})
+
 export {
   Themes,
   ExtraTheme,