diff --git a/.github/workflows/preview-theme.yml b/.github/workflows/preview-theme.yml
new file mode 100644
index 00000000..44782eed
--- /dev/null
+++ b/.github/workflows/preview-theme.yml
@@ -0,0 +1,30 @@
+name: Theme preview
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+    branches:
+      - master
+      - theme-preview-script
+      - "themes/index.js"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: setup node
+        uses: actions/setup-node@v1
+        with:
+          node-version: "12.x"
+
+      - name: npm install, preview theme
+        run: |
+          npm install
+          npm run preview-theme
+        env:
+          CI: true
+          PERSONAL_TOKEN: ${{ secrets.PERSONAL_TOKEN }}
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/package.json b/package.json
index d167c1b5..af82b595 100644
--- a/package.json
+++ b/package.json
@@ -6,18 +6,22 @@
   "scripts": {
     "test": "jest --coverage",
     "test:watch": "jest --watch",
-    "theme-readme-gen": "node scripts/generate-theme-doc"
+    "theme-readme-gen": "node scripts/generate-theme-doc",
+    "preview-theme": "node scripts/preview-theme"
   },
   "author": "Anurag Hazra",
   "license": "MIT",
   "devDependencies": {
+    "@actions/core": "^1.2.4",
+    "@actions/github": "^4.0.0",
     "@testing-library/dom": "^7.20.0",
     "@testing-library/jest-dom": "^5.11.0",
     "axios": "^0.19.2",
     "axios-mock-adapter": "^1.18.1",
     "css-to-object": "^1.1.0",
     "husky": "^4.2.5",
-    "jest": "^26.1.0"
+    "jest": "^26.1.0",
+    "parse-diff": "^0.7.0"
   },
   "dependencies": {
     "dotenv": "^8.2.0",
diff --git a/scripts/preview-theme.js b/scripts/preview-theme.js
new file mode 100644
index 00000000..4935b778
--- /dev/null
+++ b/scripts/preview-theme.js
@@ -0,0 +1,77 @@
+const core = require("@actions/core");
+const github = require("@actions/github");
+const parse = require("parse-diff");
+require("dotenv").config();
+
+const parsePullRequestId = (githubRef) => {
+  const result = /refs\/pull\/(\d+)\/merge/g.exec(githubRef);
+  if (!result) {
+    console.log("Reference not found.");
+    return 297;
+  }
+  const [, pullRequestId] = result;
+  return pullRequestId;
+};
+
+async function run() {
+  try {
+    const token = core.getInput("token");
+    const octokit = github.getOctokit(token || process.env.PERSONAL_TOKEN);
+    const pullRequestId = parsePullRequestId(process.env.GITHUB_REF);
+
+    let res = await octokit.pulls.get({
+      owner: "anuraghazra",
+      repo: "github-readme-stats",
+      pull_number: pullRequestId,
+      mediaType: {
+        format: "diff",
+      },
+    });
+
+    let diff = parse(res.data);
+    let colorStrings = diff
+      .find((file) => file.to === "themes/index.js")
+      .chunks[0].changes.filter((c) => c.type === "add")
+      .map((c) => c.content.replace("+", ""))
+      .join("");
+
+    let matches = colorStrings.match(/(title_color:.*bg_color.*\")/);
+    let colors = matches && matches[0].split(",");
+
+    if (!colors) {
+      await octokit.issues.createComment({
+        owner: "anuraghazra",
+        repo: "github-readme-stats",
+        body: `
+        \rTheme preview (bot)
+        Cannot create theme preview
+        `,
+        issue_number: pullRequestId,
+      });
+      return;
+    }
+    colors = colors.map((color) =>
+      color.replace(/.*\:\s/, "").replace(/\"/g, "")
+    );
+
+    let titleColor = colors[0];
+    let iconColor = colors[1];
+    let textColor = colors[2];
+    let bgColor = colors[3];
+    const url = `https://github-readme-stats.vercel.app/api?username=anuraghazra&title_color=${titleColor}&icon_color=${iconColor}&text_color=${textColor}&bg_color=${bgColor}&show_icons=true`;
+
+    await octokit.issues.createComment({
+      owner: "anuraghazra",
+      repo: "github-readme-stats",
+      body: `
+      \rTheme preview (bot)  
+      \r![](${url})
+      `,
+      issue_number: pullRequestId,
+    });
+  } catch (error) {
+    core.setFailed(error.message);
+  }
+}
+
+run();
diff --git a/themes/README.md b/themes/README.md
index 8d110ae7..c091b76e 100644
--- a/themes/README.md
+++ b/themes/README.md
@@ -22,8 +22,9 @@ Use `?theme=THEME_NAME` parameter like so :-
 | `highcontrast` ![highcontrast][highcontrast] | `dracula` ![dracula][dracula] | `prussian` ![prussian][prussian] |
 | `monokai` ![monokai][monokai] | `vue` ![vue][vue] | `shades-of-purple` ![shades-of-purple][shades-of-purple] |
 | `nightowl` ![nightowl][nightowl] | `buefy` ![buefy][buefy] | `blue-green` ![blue-green][blue-green] |
-| `algolia` ![algolia][algolia] | `great-gatsby` ![great-gatsby][great-gatsby] | `solarized-dark` ![solarized-dark][solarized-dark] |
-| `solarized-light` ![solarized-light][solarized-light] |  | [Add your theme][add-theme] |
+| `algolia` ![algolia][algolia] | `great-gatsby` ![great-gatsby][great-gatsby] | `bear` ![bear][bear] |
+| `solarized-dark` ![solarized-dark][solarized-dark] | `solarized-light` ![solarized-light][solarized-light] | `nord` ![nord][nord] |
+| `gotham` ![gotham][gotham] |  | [Add your theme][add-theme] |
 
 ## Repo Card
 
@@ -37,8 +38,9 @@ Use `?theme=THEME_NAME` parameter like so :-
 | `highcontrast` ![highcontrast][highcontrast_repo] | `dracula` ![dracula][dracula_repo] | `prussian` ![prussian][prussian_repo] |
 | `monokai` ![monokai][monokai_repo] | `vue` ![vue][vue_repo] | `shades-of-purple` ![shades-of-purple][shades-of-purple_repo] |
 | `nightowl` ![nightowl][nightowl_repo] | `buefy` ![buefy][buefy_repo] | `blue-green` ![blue-green][blue-green_repo] |
-| `algolia` ![algolia][algolia_repo] | `great-gatsby` ![great-gatsby][great-gatsby_repo] | `solarized-dark` ![solarized-dark][solarized-dark_repo] |
-| `solarized-light` ![solarized-light][solarized-light_repo] |  | [Add your theme][add-theme] |
+| `algolia` ![algolia][algolia_repo] | `great-gatsby` ![great-gatsby][great-gatsby_repo] | `bear` ![bear][bear_repo] |
+| `solarized-dark` ![solarized-dark][solarized-dark_repo] | `solarized-light` ![solarized-light][solarized-light_repo] | `nord` ![nord][nord_repo] |
+| `gotham` ![gotham][gotham_repo] |  | [Add your theme][add-theme] |
 
 
 [default]: https://github-readme-stats.vercel.app/api?username=anuraghazra&show_icons=true&hide=contribs,prs&cache_seconds=86400&theme=default
@@ -62,8 +64,11 @@ Use `?theme=THEME_NAME` parameter like so :-
 [blue-green]: https://github-readme-stats.vercel.app/api?username=anuraghazra&show_icons=true&hide=contribs,prs&cache_seconds=86400&theme=blue-green
 [algolia]: https://github-readme-stats.vercel.app/api?username=anuraghazra&show_icons=true&hide=contribs,prs&cache_seconds=86400&theme=algolia
 [great-gatsby]: https://github-readme-stats.vercel.app/api?username=anuraghazra&show_icons=true&hide=contribs,prs&cache_seconds=86400&theme=great-gatsby
+[bear]: https://github-readme-stats.vercel.app/api?username=anuraghazra&show_icons=true&hide=contribs,prs&cache_seconds=86400&theme=bear
 [solarized-dark]: https://github-readme-stats.vercel.app/api?username=anuraghazra&show_icons=true&hide=contribs,prs&cache_seconds=86400&theme=solarized-dark
 [solarized-light]: https://github-readme-stats.vercel.app/api?username=anuraghazra&show_icons=true&hide=contribs,prs&cache_seconds=86400&theme=solarized-light
+[nord]: https://github-readme-stats.vercel.app/api?username=anuraghazra&show_icons=true&hide=contribs,prs&cache_seconds=86400&theme=nord
+[gotham]: https://github-readme-stats.vercel.app/api?username=anuraghazra&show_icons=true&hide=contribs,prs&cache_seconds=86400&theme=gotham
 
 
 [default_repo]: https://github-readme-stats.vercel.app/api/pin/?username=anuraghazra&repo=github-readme-stats&cache_seconds=86400&theme=default
@@ -87,8 +92,11 @@ Use `?theme=THEME_NAME` parameter like so :-
 [blue-green_repo]: https://github-readme-stats.vercel.app/api/pin/?username=anuraghazra&repo=github-readme-stats&cache_seconds=86400&theme=blue-green
 [algolia_repo]: https://github-readme-stats.vercel.app/api/pin/?username=anuraghazra&repo=github-readme-stats&cache_seconds=86400&theme=algolia
 [great-gatsby_repo]: https://github-readme-stats.vercel.app/api/pin/?username=anuraghazra&repo=github-readme-stats&cache_seconds=86400&theme=great-gatsby
+[bear_repo]: https://github-readme-stats.vercel.app/api/pin/?username=anuraghazra&repo=github-readme-stats&cache_seconds=86400&theme=bear
 [solarized-dark_repo]: https://github-readme-stats.vercel.app/api/pin/?username=anuraghazra&repo=github-readme-stats&cache_seconds=86400&theme=solarized-dark
 [solarized-light_repo]: https://github-readme-stats.vercel.app/api/pin/?username=anuraghazra&repo=github-readme-stats&cache_seconds=86400&theme=solarized-light
+[nord_repo]: https://github-readme-stats.vercel.app/api/pin/?username=anuraghazra&repo=github-readme-stats&cache_seconds=86400&theme=nord
+[gotham_repo]: https://github-readme-stats.vercel.app/api/pin/?username=anuraghazra&repo=github-readme-stats&cache_seconds=86400&theme=gotham
 
 
 [add-theme]: https://github.com/anuraghazra/github-readme-stats/edit/master/themes/index.js
diff --git a/themes/index.js b/themes/index.js
index 2f0c78ae..8e2ba724 100644
--- a/themes/index.js
+++ b/themes/index.js
@@ -113,18 +113,24 @@ const themes = {
     text_color: "0cf574",
     bg_color: "040f0f",
   },
-  "algolia": {
+  algolia: {
     title_color: "00AEFF",
     icon_color: "2DDE98",
     text_color: "FFFFFF",
     bg_color: "050F2C",
   },
-  "great-gatsby":{
+  "great-gatsby": {
     title_color: "ffa726",
     icon_color: "ffb74d",
     text_color: "ffd95b",
     bg_color: "000000",
   },
+  bear: {
+    title_color: "e03c8a",
+    icon_color: "00AEFF",
+    text_color: "bcb28d",
+    bg_color: "1f2023",
+  },
   "solarized-dark": {
     title_color: "268bd2",
     icon_color: "b58900",
@@ -137,6 +143,18 @@ const themes = {
     text_color: "859900",
     bg_color: "fdf6e3",
   },
+  nord: {
+    title_color: "81a1c1",
+    text_color: "d8dee9",
+    icon_color: "88c0d0",
+    bg_color: "2e3440",
+  },
+  "gotham": {
+    title_color: "2aa889",
+    icon_color: "599cab",
+    text_color: "99d1ce",
+    bg_color: "0c1014",
+  },
 };
 
 module.exports = themes;