Color Palette Generator: Free HEX & RGB Codes

A color palette generator builds a matching set of colors from one base color you choose. This free tool is for web designers, developers and brand owners: pick a base color, choose a palette type such as complementary or triadic, and get HEX, RGB and HSL codes you can copy straight into CSS or design software.

What Is a Color Palette?

A color palette is a small, planned set of colors that work together across a design, such as a website, logo, app interface or wedding theme. Instead of picking each color by eye, you start from one base color and derive the others by following a rule.

The rules come from the color wheel. Every color has a hue (its position on the wheel, from 0 to 360 degrees), a saturation (how vivid it is) and a lightness (how close it is to black or white). The generator reads your base color as those three values, moves the hue or the lightness in fixed steps, and converts the results back into color codes.

Each swatch is shown in three formats. A HEX code such as #6366F1 is the six-digit format used in CSS and most design apps. RGB lists the red, green and blue amounts from 0 to 255. HSL lists hue, saturation and lightness. Here is what each palette type produces:

How to Use the Color Palette Generator

You can build a palette in three actions: pick a color, pick a type and click a button. Here are the steps in order.

1. Choose your Base Color with the color picker, or type a six-digit HEX code into the text box next to it. The tool opens with #6366f1 already filled in.
2. Open the Palette Type menu and select Complementary, Analogous, Triadic, Tetradic, Monochromatic or Shades & Tints. Monochromatic is selected by default.
3. Click Generate Palette. A row of swatches appears under a heading that names the palette type.
4. Read the codes on each swatch. You get the HEX value in capital letters, the RGB value and the HSL value.
5. Click any swatch to copy its HEX code, then paste it into your stylesheet or design file.
6. Change the base color or the palette type and click the button again to compare options.

Worked Example: A Palette From #6366F1

Say you are designing a landing page for a software product and your brand color is the indigo #6366f1. The generator reads it as hsl(239, 84%, 67%): hue 239, saturation 84% and lightness 67%. Here is what three palette types return for it.

• Complementary: two swatches, your indigo and a soft yellow close to #F2EF64 (hue 59). The yellow works well for a call-to-action button or a highlight against the indigo.
• Triadic: three swatches at hues 239, 359 and 119, which gives you indigo, a pink-red and a green. This is a lively set, so use one color as the lead and the others sparingly.
• Monochromatic: five swatches with lightness of 37%, 52%, 67%, 82% and 90%. The last one stops at 90% instead of 97% because the tool keeps lightness between 10% and 90%. The middle swatch is exactly your base color.

To use the monochromatic result, set the darkest swatch as your heading color, the middle swatch as buttons and links, and the lightest swatch as a section background. Everything stays in one color family, so the page looks consistent without extra effort.

How Do You Read and Use the Results?

Each swatch is a ready-to-use color: the HEX code goes into CSS or a design app, and the RGB and HSL values help when a tool asks for a different format. What matters next is choosing the right palette type and applying the colors in sensible proportions.

Pick the Right Palette Type

• Monochromatic: the safest choice for interfaces. It gives you a text color, a base and light backgrounds in one hue.
• Analogous: calm and harmonious, good for hero banners and illustrations. The colors are close together, so do not rely on them to separate a button from its background.
• Complementary: the strongest contrast. Use the second color as an accent, not as a second background.
• Triadic and Tetradic: playful and colorful. Choose one dominant color and keep the rest for small details.
• Shades & Tints: a nine-step scale from near black to near white, handy for design systems that need light and dark variants of one color.

Apply the 60-30-10 Guideline

A widely used design guideline suggests about 60% of a layout in a dominant color, 30% in a secondary color and 10% in an accent. Take the dominant and secondary colors from the lightest and middle swatches, and save the boldest swatch for the accent.

Check Text Contrast Before You Ship

Harmonious colors are not always readable. WCAG 2.1 asks for a contrast ratio of at least 4.5 to 1 for normal body text at level AA, and mid-lightness swatches often fail with white text. Test your text and background pair with the color contrast checker before you commit to it.

Who Uses a Color Palette Maker?

Anyone who needs colors that look intentional but has only one starting color will find this useful. These are the situations where it fits best.

• Front-end developers who have one brand HEX code and need hover, border and background variants for CSS variables.
• Designers starting a mood board or testing several color harmonies from the same base in a few clicks.
• Small business owners picking supporting colors for a logo, flyer or website after settling on a main color.
• Students and teachers exploring color theory, since the tool shows exactly how hue changes create each scheme.
• Event planners building a wedding or party palette from one key color, such as a bridesmaid dress shade.

Once your colors are set, you can shape the components that use them with the border radius generator and the CSS box shadow generator.

Best Practices, Common Mistakes and Troubleshooting

Most problems come from the input color or from expectations about how the schemes are calculated. These are the cases people run into most often.

Common Mistakes

• Typing the wrong HEX format. The tool needs a hash sign and exactly six characters. Shorthand such as #f80 is rejected with an error message, so expand it to #ff8800.
• Leaving the text box half edited. The Generate Palette button reads the text box, so make sure it shows the finished code before you click.
• Starting from a gray. A gray has zero saturation, so moving the hue changes nothing and every swatch stays gray. Pick a color with some saturation first.
• Using every swatch equally. A palette is a menu, not a mandate. Two or three colors with clear roles beat six colors with none.
• Expecting artist-wheel results. The tool works on the screen color wheel, so the opposite of blue-violet is yellow, not the orange you might get from a paint-style wheel.

Practical Tips

• Generate several palette types from the same base and compare them side by side before choosing.
• Lower the base color's saturation slightly for a calmer, more professional look, then generate again.
• Paste the HEX codes into the color fields of design apps such as Figma, Canva or Illustrator, or store them as CSS custom properties so you can change them in one place.
• Keep a neutral (white, near black or a light gray) alongside your palette for text and backgrounds.

What Are the Limits of This Tool?

The generator starts from one HEX color and uses fixed rules, so it is a starting point rather than a finished brand system. Knowing the boundaries saves time.

• It does not read photos, color names or words. To pull colors out of a picture, use the color palette extractor, then bring one of those colors back here as your base.
• The hue steps are fixed. You cannot change the 30-degree spacing of an analogous palette or the lightness steps of a monochromatic one.
• The Shades & Tints scale uses your base hue and saturation at set lightness levels from 10% to 90%, so your exact base HEX may not appear in the list.
• Palettes are not saved. Copy the codes you want before you leave the page.
• The tool checks color math, not taste or accessibility. A mathematically balanced palette can still look wrong for your audience.

If you need a quick, reliable set of matching colors from one base, enter your HEX code above, choose a palette type and click Generate Palette. For more utilities in the same family, browse the web developer tools collection.