Image Tools
Color Palette Generator — Base Color to 5-Swatch Harmony
Generate a 5-color palette free from any base hex — complementary plus 3 analogous swatches. Copy the full palette as JSON instantly. No signup — pick a colo...
Color Palette Generator on FYN Tools is a free Image Tools utility. Open Color Palette Generator in your browser — no signup required. Pick or type a base hex color, click Generate Palette, and get five swatches — your base color, one complementary (RGB-inverted) color, and three analogous variants — then copy the entire array as formatted JSON with one click. Related: Color Picker Tool.
Privacy & processing: 100% client-side browser processing — palette colors are calculated with simple RGB math in JavaScript locally; nothing is sent to a server.
TL;DR: Pick or type a base hex color, click Generate Palette, and get five swatches — your base color, one complementary (RGB-inverted) color, and three analogous variants — then copy the entire array as formatted JSON with one click.
Reviewed by FYN Tools Editorial · Guides ·
Data input / output
| Inputs | A base color as hex (via color input or text field, default #3b82f6) |
|---|---|
| Outputs | Five hex color swatches displayed visually, copyable as a JSON array |
| Formats | Hex colors in (#rrggbb) format; JSON array output via Copy All as JSON |
| Limits | Simple RGB inversion for complementary and linear RGB shifts for analogous — not a full color-theory engine with HSL wheel calculations |
| Processing | Client-side (browser JavaScript color math) |
How to Use the Color Palette Generator
- Pick a base color using the color input or type a hex value in the text field.
- Click Generate Palette.
- Review the five swatches displayed in the grid (base, complementary, three analogous).
- Copy individual hex values from each swatch if you only need one.
- Click Copy All as JSON to copy the full palette array for use in code or design tools.
- Change the base color and regenerate to explore different harmonies.
What is a Color Palette Generator?
Enter a base color using the color picker input or type a hex value like #3b82f6, then click Generate Palette. The tool produces five swatches: your base color, a complementary color computed by inverting each RGB channel (255 − r, 255 − g, 255 − b), and three analogous colors generated by shifting each channel toward 255 by factors of 0.3, 0.6, and 0.9. The result is a quick starting palette rather than a rigorous color-theory calculation on the HSL wheel.
Each swatch displays its hex value with an individual copy button, and a Copy All as JSON button copies the entire palette as a formatted JSON array (JSON.stringify with 2-space indent). Everything runs client-side — no API calls and no account required.
The generator parses the base hex into RGB integers, pushes the base color, computes the complementary via channel inversion, then loops three times applying a linear brighten factor to each channel (clamped to 0–255) for the analogous swatches. The resulting string array is stored in state and rendered as color blocks in a responsive grid.
How it works
You set image file upload (png/jpg/webp as supported) + on-screen settings in the live panel. Color Palette Generator then generate color palettes from images or custom inputs. Results show as processed image preview + download.
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Usage scenarios
- Landing page theme draft: Generate a palette from your brand primary hex, copy the JSON, and paste it into a CSS custom properties block or Tailwind config draft.
- Chart color series: Use the five swatches as a default color array for a Chart.js or D3 visualization.
- Complementary accent exploration: Check the complementary swatch (swatch 2) against your base to decide on a CTA button accent color.
Input / Output Examples
Input
Image file upload (PNG/JPG/WebP as supported) + on-screen settings
Output
Processed image preview + download
Input
Open /color-palette-generator and run a second sample
Output
Processed image preview + download (iterate settings if the tool has options)
Frequently Asked Questions
What types of color palettes can I generate?+
Our generator creates complementary, analogous, and triadic color schemes based on your base color, providing harmonious combinations perfect for design projects.
How do I use the generated colors in my designs?+
Click on any color in the palette to copy its hex code to your clipboard. You can then paste these codes into your design software, CSS, or any application that accepts hex colors.
What's the difference between color harmony types?+
Complementary colors are opposite on the color wheel and create contrast. Analogous colors are adjacent and create harmony. Our generator provides balanced combinations for various design needs.
Can I start with any base color?+
Yes, you can use the color picker to select any color or enter a specific hex code. The generator will create a palette based on your chosen base color.
Are these colors suitable for web design?+
Absolutely! All generated colors are web-safe and provided in hex format, making them perfect for websites, apps, and digital designs.
Key Features
- Base color picker and hex text input
- Complementary color (RGB inversion)
- Three analogous color variants
- Five-swatch visual grid
- Copy All as JSON button
Benefits
Skip manual color math when prototyping a theme.
Export a ready-to-paste JSON array for code projects.
Explore complementary and lighter variants instantly.
When to Use Color Palette Generator
- Getting a quick five-color starting point for a landing page or app theme
- Exploring complementary and lighter variants of a brand color
- Exporting a color array as JSON for a design token file or chart configuration
- Brainstorming color directions before fine-tuning in a full design tool
Advantages
- Five swatches from one base color in one click
- Visual grid with per-swatch hex display
- Copy entire palette as formatted JSON
- Color input and hex text field for precise base entry
Tips
- Treat the output as a starting point — fine-tune swatches in your design tool afterward.
- The complementary color uses simple RGB inversion, which differs from HSL 180° complementary on the color wheel.
- Copy as JSON when you need the palette in code; copy individual swatches for CSS hex values.
- Regenerate after small base color tweaks to see how the analogous shifts change.
Common Mistakes
Expecting scientifically precise HSL complementary colors — this tool uses RGB channel inversion.
Assuming analogous swatches are evenly spaced on the color wheel — they are linear RGB brighten shifts.
Using the palette directly without checking contrast ratios for text accessibility.
Summary
Pick a base hex, generate five swatches (base, complementary, three analogous), and copy the palette as JSON or individual hex values — a quick client-side starting point for any color scheme.