You have your brand or project's main color, but you need two or three more colors that combine well with it for buttons, backgrounds or accents, and picking them "by eye" carries a real risk that the final result looks unbalanced or simply doesn't match. Color theory has spent centuries studying exactly this problem, and the rules it's found can be applied automatically starting from a single base color.
The color relationships that actually work
- Complementary: colors located at opposite poles of the color wheel. They generate the maximum possible contrast, ideal for elements that need to stand out clearly (an action button over a background).
- Analogous: adjacent colors on the color wheel. They share a certain tonal similarity, producing harmonic, soft combinations, typical of natural or relaxed palettes.
- Triadic: three equidistant colors on the color wheel, forming a triangle. They offer lively contrast while keeping some balance, popular in designs with personality but no visual chaos.
- Shades: variations in lightness and saturation of the same base color, useful for creating a coherent monochromatic palette with different levels of emphasis.
How to generate a harmonic palette
- Enter or choose your base color (in HEX, or selecting it visually).
- Choose the relationship type: complementary, analogous, triadic or shades.
- The tool automatically calculates the colors that satisfy that relationship with your base color.
- Copy any HEX from the resulting palette.
You can do it free with the color palette generator on this site.
Why this works better than picking colors by eye
The color wheel isn't an arbitrary convention: it represents the mathematical relationships between hues that the human eye consistently perceives as harmonic or contrasting. Automatically calculating these relationships from your base color guarantees the resulting palette respects those exact relationships, something much harder to get right just looking at a color picker and trying to "guess" what matches well.
When to use each type of palette
- You need an element to stand out clearly (call to action, alert): complementary.
- You're going for a calm, cohesive feel (editorial content, soft branding): analogous.
- You want personality and contrast without looking chaotic (creative brand, product with strong identity): triadic.
- You need variations of the same color for different states (hover, active, disabled): shades.
Frequently asked questions
Do I need to know color theory to use this? No, the tool calculates the relationships automatically; you only need to choose the base color and the palette type.
Can I start from a color I already have in HEX? Yes, you can directly enter your brand or project color's HEX code.
Which palette type is safest for a new project? Analogous or shades tend to be the easiest to apply coherently with no prior design experience.
Is my palette saved on any server? No, all the calculation happens in your browser.
Generate harmonic color palettes for free with the color palette generator, with complementary, analogous, triadic combinations and shades.