Pastel API Playground

Pastel API Playground delivers a playful, light documentation UI for modern APIs with a soft gradient palette of green, cyan, pink, and red. It features a sticky sidebar, status badges, copyable code blocks, and a theme toggle—perfect for SaaS teams shipping endpoint references, quickstart guides, and SDK docs.

This template was generated by an AI in three stages. You can explore each version to see the progression from a basic concept to a polished final product. All versions are available for you to download for free.

Finalized Preview: The polished and complete version.

Was this template helpful?

Your vote helps other creators discover the highest quality Tailwind templates.

-1

One vote per template per user (IP restricted).

Image Credits

We instruct the LLM APIs to use Unsplash for images. Credits go to the photographers below:

Initial

  • No Unsplash photos used by function call.

Refined

  • No Unsplash photos used by function call.

Finalized

  • No Unsplash photos used by function call.
Name missing? Let us know, we'll be happy to add it.
Nebula Trial Signup thumbnail
Previous Template

Nebula Trial Signup

Bold, dark-mode SaaS sign-up page featuring slate and blue gradients, vibrant yellow CTAs, and red validation states. Designed for startups and product teams launching free trials, it includes email/password with strength meter, OAuth buttons, terms consent, and benefits list—optimized for fast onboarding, conversion, and mobile responsiveness.

B2B Success Hub thumbnail
Next Template

B2B Success Hub

A corporate, light-theme case studies page for B2B software brands, featuring a bold hero with gradient accents in violet, fuchsia, and orange, filterable industry tags, and conversion-focused CTAs. Clean neutral spacing, responsive grid cards, and SEO-ready headings showcase measurable results, testimonials, and metrics—perfect for SaaS marketing and lead generation.

View Generation History ↓

AI Generation Journey

Below, you'll find the complete prompt history that sculpted this Tailwind template. Large Language Models are a truly revolutionary invention that we must embrace. We've found that sometimes, a little *creative prompting* – a gentle nudge or a slight exaggeration – helps them truly shine and deliver their best.

S
Role: system - input 
You are an elite AI template generator under extremely high pressure. Every output must be flawless, professional, and production-ready. Your task is to generate **full HTML documents** for admin panels, dashboards, landing pages or other pages, using **Tailwind CSS via CDN** and **Alpine.js via CDN** if interactivity is required.  

Rules:
1. Always output a **complete HTML document** with <!DOCTYPE html>, <html>, <head>, and <body>.
2. Use **Tailwind CSS via CDN**: <script src="https://cdn...
U
Role: user - input 
I would like to build: A developer documentation page for an API.
Make sure the templates' style is playful and that it has a lightTry to make use of the following colors: green,cyan,pink,red
A
Role: assistant - output 
```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>API Documentation - Playful Docs</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script defer src="https://unpkg.com/alpinejs@3.x.x/dist/cdn.min.js"></script>
    <script>
        tailwind.config = {
            theme: {
                extend: {
                    colors: {
                        'playful-green': ...
A
Role: app - input 
Cut off sign found in output. Terminating loop.
S
Role: system - input 
You are an expert frontend auditor/refiner. Your job is to take an already generated **HTML document** and polish it to perfection.Assume the input is valid HTML created with Tailwind CSS (via CDN) and optionally Alpine.js.
The user will give you a html template which is a good start, but needs to be WAY better. Think of transitions, effects, icons and images. Make sure the global style stays in tact, but modernize and improve where needed. Use the tool call for images. Make sure everything wor...
U
Role: user - input 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>API Documentation - Playful Docs</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script defer src="https://unpkg.com/alpinejs@3.x.x/dist/cdn.min.js"></script>
    <script>
        tailwind.config = {
            theme: {
                extend: {
                    colors: {
                        'playful-green': '#a7f3d0...
A
Role: assistant - output
Tool call Type: function Name: query_unsplash_api Arguments: {"keywords": "colorful api documentation technology"}
A
Role: assistant - output
Tool call Type: function Name: query_unsplash_api Arguments: {"keywords": "developer coding workspace colorful"}
A
Role: assistant - output
Tool call Type: function Name: query_unsplash_api Arguments: {"keywords": "api integration colorful abstract background"}
A
Role: assistant - output 
```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>API Documentation - Playful Docs</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script defer src="https://unpkg.com/alpinejs@3.x.x/dist/cdn.min.js"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <script>
        tailwind.config = {
         ...
U
Role: user - input 
Your last output ended like this:

-gray-800">Examples</h2>
                    </div>
                    
                    <div class="grid md:grid-cols-2 gap-6">
                        <div class="bg-gradient-to-br from-playful-red/20 to-playful-pink/20 p-6 rounded-2xl border-l-4 border-playful-red">
                            <h3 class="text-xl font-semibold mb-3 flex items-center gap-2">
                                <i

Continue directly after this point. Do not repeat any of the ab...
A
Role: assistant - output 
class="fab fa-js text-playful-red"></i> JavaScript Example
                            </h3>
                            <div class="code-block">
                                <pre class="bg-gray-900 text-red-400 p-4 rounded-lg overflow-x-auto font-mono text-sm">
<code>async function fetchUsers() {
    const response = await fetch('/v1/users', {
        headers: {
            'Authorization': 'Bearer YOUR_API_KEY'
        }
    });
    return await response.json();
}</code>
                   ...
A
Role: app - input 
Cut off sign found in output. Terminating loop.
S
Role: system - input 
You are an expert frontend auditor/refiner. Your job is to take an already generated **HTML document** and polish it to perfection.Assume the input is valid HTML created with Tailwind CSS (via CDN) and optionally Alpine.js.
The user will give you a html template which is a good start, but needs to be WAY better. Think of transitions, effects, icons and images. Make sure the global style stays in tact, but modernize and improve where needed. Use the tool call for images. Make sure everything wor...
U
Role: user - input 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>API Documentation - Playful Docs</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script defer src="https://unpkg.com/alpinejs@3.x.x/dist/cdn.min.js"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <script>
        tailwind.config = {
            theme...
A
Role: assistant - output 
<!DOCTYPE html>
<html lang="en" class="scroll-smooth">
<head>
    <meta charset="UTF-8">
    <meta name="description" content="Playful, modern API documentation with colorful UI, code snippets, and examples to get you building quickly.">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>API Documentation - Playful Docs</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <script defer src="https://unpkg.com/alpinejs@3.x.x/dist/cdn.min.js"></scri...
A
Role: app - input 
Cut off sign found in output. Terminating loop.