Draw a Number as Color Spectrum

The Number Color Spectrum Visualizer is a creative data-art tool that transforms any sequence of digits into a striking visual barcode. By mapping each numerical digit ($0$ through $9$) to a distinct hue or shade, you can literally "see" mathematical sequences.

This is exceptionally beautiful when applied to irrational numbers like $\pi$ or mathematically chaotic sequences, as the resulting gradient reflects the underlying randomness (or lack thereof).

• Multiple Color Algorithms: Rainbow (360-degree split), Heatmap (red-to-yellow scale), and Grayscale.
• Real-time Rendering: The spectrum paints instantly as you type.
• Responsive Canvas: Flex-based rendering ensures the barcode stretches beautifully to fill your screen.

1. Enter a Number: Type or paste any number (the longer, the better). Non-numeric characters will be ignored.
2. Select a Color Palette: Choose Rainbow (HSL distribution), Grayscale (density mapping), or Heatmap (warm colors).
3. View the Spectrum: The canvas will automatically render a segmented color bar representing your number.
4. Adjust Block Width: Change how wide or narrow each color slice appears.