diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..8e925c6
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,27 @@
+name: CI
+on:
+  push:
+    branches: [master]
+  pull_request:
+    types: [opened, synchronize]
+jobs:
+  build:
+    runs-on: ubuntu-16.04
+    strategy:
+      matrix:
+        deno: ["v1.3.2"]
+    name: Deno ${{ matrix.deno }} sample
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Deno
+        uses: denolib/setup-deno@v2
+        with:
+          deno-version: ${{ matrix.deno }}
+      - name: Check formatted codebase 
+        run: |
+          deno fmt --check examples/
+          deno fmt --check index.ts
+      - name: Run examples/
+        run: |
+          deno run examples/simple.ts
+          deno run examples/custom.ts
diff --git a/README.md b/README.md
index f7858e6..884194b 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Generate Badges for your CLI.
 
-[![deno land](http://img.shields.io/badge/available%20on-deno.land/x-lightgrey.svg?logo=deno&labelColor=black)](https://deno.land/x/cli_badges)  [![deno version](https://img.shields.io/badge/deno-^1.3.2-lightgrey?logo=deno)](https://github.com/denoland/deno) [![GitHub release](https://img.shields.io/github/release/Delta456/cli_badges.svg)](https://github.com/Delta456/cli_badges/releases)
+[![deno land](http://img.shields.io/badge/available%20on-deno.land/x-lightgrey.svg?logo=deno&labelColor=black)](https://deno.land/x/cli_badges)  [![deno version](https://img.shields.io/badge/deno-^1.3.2-lightgrey?logo=deno)](https://github.com/denoland/deno) [![GitHub release](https://img.shields.io/github/release/Delta456/cli_badges.svg)](https://github.com/Delta456/cli_badges/releases) [![GitHub Actions](https://github.com/Delta456/box-cli-maker/workflows/cli%20badges/badge.svg)](https://github.com/Delta456/cli_badges/actions?query=workflow%3ACI)
 
 
 ## Features
@@ -16,7 +16,7 @@ Generate Badges for your CLI.
 ## Usage
 
 ```ts
-import { badges } from "https://deno.land/x/cli_badges@v0.0.3/index.ts";
+import { badges } from "https://deno.land/x/cli_badges@v0.0.4/index.ts";
 
 console.log(badges('failed', '2', {msgBg: "red"}))
 
diff --git a/examples/custom.ts b/examples/custom.ts
new file mode 100644
index 0000000..a7d0dc2
--- /dev/null
+++ b/examples/custom.ts
@@ -0,0 +1,7 @@
+import { badges } from "https://deno.land/x/cli_badges@v0.0.3/index.ts";
+
+console.log(badges("failed", "2", { msgBg: "red" }));
+
+console.log(badges("success", "2", { msgBg: "green" }));
+
+console.log(badges("skipped", "2", { msgBg: "yellow" }));
diff --git a/examples/simple.ts b/examples/simple.ts
new file mode 100644
index 0000000..687413a
--- /dev/null
+++ b/examples/simple.ts
@@ -0,0 +1,3 @@
+import { badges } from "https://deno.land/x/cli_badges@v0.0.3/index.ts";
+
+console.log(badges("counter", "5"));
diff --git a/index.ts b/index.ts
index 040d384..8865b0f 100644
--- a/index.ts
+++ b/index.ts
@@ -1,14 +1,33 @@
 import * as color from "https://deno.land/std@0.67.0/fmt/colors.ts";
 
-type ColorType = { [x: string]: (str: string) => string };
+type Color =
+  | "black"
+  | "red"
+  | "blue"
+  | "green"
+  | "yellow"
+  | "magenta"
+  | "cyan"
+  | "white"
+  | "brightBlack"
+  | "brightRed"
+  | "brightBlue"
+  | "brightGreen"
+  | "brightYellow"
+  | "brightMagenta"
+  | "brightCyan"
+  | "brightWhite";
+type Format = "italic" | "underline" | "bold" | "inverse" | "dim" | "strike";
+type ColorType = { [c in Color]: (str: string) => string };
+type FormatType = { [format in Format]: (str: string) => string };
 
 export interface BadgeOptions {
-  msgBg: string;
-  labelBg: string;
-  msgColor: string;
-  labelColor: string;
-  msgStyle?: string;
-  labelStyle?: string;
+  msgBg: Color;
+  labelBg: Color;
+  msgColor: Color;
+  labelColor: Color;
+  msgStyle?: Format;
+  labelStyle?: Format;
   msgWidth?: number;
   labelWidth?: number;
 }
@@ -51,7 +70,7 @@ const colorTypes: ColorType = {
   brightWhite: (str: string) => color.brightWhite(str),
 };
 
-const formatters: ColorType = {
+const formatters: FormatType = {
   bold: (str: string) => color.bold(str),
   italic: (str: string) => color.italic(str),
   inverse: (str: string) => color.inverse(str),
@@ -60,7 +79,7 @@ const formatters: ColorType = {
   underline: (str: string) => color.underline(str),
 };
 
-function padd(str: string, width: number | undefined): string {
+function padd(str: string, width?: number): string {
   if (!width) width = str.length + 2; // one space on each side
 
   const halfWith = Math.ceil((width - str.length) / 2);
@@ -70,7 +89,7 @@ function padd(str: string, width: number | undefined): string {
 }
 
 function getBgColor(
-  colr: string | undefined,
+  colr?: Color,
 ): (str: string) => string {
   if (!colr) {
     return color.bgBrightBlack;
@@ -79,17 +98,17 @@ function getBgColor(
 }
 
 function getTextColor(
-  colr: string | undefined,
+  colr?: Color,
 ): (str: string) => string {
   if (!colr) {
-    return color.blue;
+    return color.white;
   }
   return colorTypes[colr];
 }
 
 function format(
   str: string,
-  formatterName: string | undefined,
+  formatterName?: Format,
 ): string {
   if (!formatterName) return str;
 
@@ -126,12 +145,12 @@ export function badges(
   const lblStr = padd(label, labelWidth);
   const msgStr = padd(msg, msgWidth);
 
-  const lblColored = getTextColor(labelColor)(
-    getBgColor(labelBg)(lblStr),
-  );
   const msgColored = getTextColor(msgColor)(
     getBgColor(msgBg)(msgStr),
   );
+  const lblColored = getTextColor(labelColor)(
+    getBgColor(labelBg)(lblStr),
+  );
 
   const labelformat = format(lblColored, labelStyle);
   const msgformat = format(msgColored, msgStyle);