Aurora Borealis Spectral Gradient

Colours in this gradient

• #020b14
• #064e3b
• #0891b2
• #7c3aed

The code

Plain HTML and CSS with no dependencies. Copy a single file, or choose "Full file" for a complete page you can save as index.html and open in a browser.

<div class="gradient"></div>

The AI prompt

Paste this into an AI coding tool to generate the same gradient, then ask it to adapt the colours, text or framework to your project.

Create a full-screen linear CSS gradient background called "Aurora Borealis Spectral".

Requirements:
- A single div that fills the viewport (min-height: 100vh).
- Use this exact background value:
  linear-gradient(135deg, #020b14 0%, #064e3b 35%, #0891b2 70%, #7c3aed 100%)
- Colours used: #020b14, #064e3b, #0891b2, #7c3aed.
- No images and no JavaScript.
- Also give me the same gradient as a Tailwind CSS arbitrary value class and as a CSS custom property (--gradient-aurora-borealis-spectral) I can reuse.

Return one HTML file with the CSS in a <style> tag.

How to build it, step by step

1. 1

   Create an element to hold the gradient and give it a size. A gradient is a background image, so an element with no height shows nothing.

2. 2

   Use linear-gradient(). The first value is the direction (an angle such as 135deg, or a keyword such as 'to top'); the rest are colour stops with optional positions.

3. 3

   Add the colour stops: #020b14 → #064e3b → #0891b2 → #7c3aed. Where no position is given, the browser spaces the stops evenly.

4. 4

   Check text contrast. Place your real heading on top and make sure it stays readable across the whole gradient, not just in one corner.

Customisation tips

• Store the gradient in a CSS custom property so every section uses the same value.
• Use white or very light text on this gradient.
• Add a subtle noise texture on top (see the Film Grain background) to remove visible colour banding on large screens.

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