Colour Palette Generator
Free tool · by Daniel HaketBuild a coherent colour palette from a single base colour. Pick your brand colour and this generates matching shades and accents with hex codes — ready for your site, deck or ad creative.
What this free tool is great for: a quick, one-off job with no signup — it runs entirely in your browser, so nothing leaves your device and there's nothing to manage.
Its honest limit: it produces a one-off output — it won't store, track, brand or manage them at scale, and it can't tell you what happens after you share it.
Why palettes beat picking colours one at a time
Most design that looks "off" doesn't have a single bad colour — it has colours that don't belong together. Choosing hues one at a time, from whatever looks nice in the moment, produces exactly that: a slow drift into visual noise. A palette flips the process — you commit to a small, related set of colours up front, and every subsequent decision becomes easier and more consistent. This generator builds harmonious palettes instantly (and entirely in your browser), but the value compounds when you understand why certain combinations work, so you can judge and adjust what it gives you rather than rolling the dice until something feels right.
The colour wheel relationships that do the work
Palette harmony isn't mystical — it's geometry on the colour wheel. Complementary colours sit opposite each other (blue/orange) and produce maximum contrast and energy; great for making a CTA pop, exhausting as a whole scheme. Analogous colours sit side by side (blue, teal, green) and feel calm and cohesive, at the cost of contrast. Triadic schemes space three hues evenly for balanced vibrancy. Monochromatic palettes vary one hue's lightness and saturation — the safest path to elegance. None is "best": complementary sells energy, analogous sells trust, mono sells sophistication. Knowing which relationship you're using is what turns a generated palette from pretty into deliberate.
The 60-30-10 rule
A palette tells you which colours; the 60-30-10 rule tells you how much of each. Roughly sixty percent of your design should be the dominant (usually neutral) colour — backgrounds, large surfaces. Thirty percent is the secondary colour giving the design its character. Ten percent is the accent — buttons, links, highlights — and its scarcity is exactly what makes it powerful. Most amateur colour work fails not on hue choice but on proportion: five colours all fighting at equal volume. Take any palette from this generator and assign roles — dominant, secondary, accent — before you touch a single pixel, and the same five swatches suddenly look professional.
Colour psychology, honestly
Colour does carry associations — blue reads as trustworthy and calm (hence every bank), red as urgent and appetite-driving, green as growth and health, black as premium. These tendencies are real enough to matter in marketing. But two honest caveats: they're cultural, not universal (white means purity in one market and mourning in another), and context beats colour every time — a scammy site in trustworthy blue is still scammy. Use psychology to shortlist directions for your brand's feel, not as a magic lever. The consistency with which you apply your palette builds more trust than any individual hue ever will.
Accessibility: the non-negotiable filter
A palette that fails contrast is a palette you can't actually use. Whatever combination you fall in love with, the pairs that will carry text — foreground on background — need to clear the WCAG contrast ratios (4.5:1 for body text, 3:1 for large text). This is where many generated palettes quietly fail: gorgeous mid-tone combinations that turn illegible the moment real words sit on them. The workflow that works: generate the palette here, then run your intended text/background pairs through our free colour contrast checker and adjust lightness until they pass. Beautiful and readable isn't a trade-off — it just requires checking.
From palette to design system
A palette becomes truly useful when it stops being five swatches and becomes named roles: primary, secondary, accent, background, surface, text, muted-text, success, warning, error. Map your generated colours to those roles (you'll typically extend the palette with tints and shades of each hue — lighter for backgrounds, darker for hover states), and store them as CSS variables or design tokens. That's the difference between "we have brand colours" and "every button, alert and link in our product is automatically consistent." It also makes future rebrands shockingly cheap: change the token values, and the whole product follows.
Stealing like a professional
The fastest route to a good palette is often not generating from scratch but extracting: pull the colours from a photo with the mood you want, or study what competitors and admired brands use and shift the hues enough to be yours. Nature is an unreasonably good palette designer — sunsets, forests and minerals produce combinations that maths alone rarely finds. Use the generator both ways: as a from-scratch tool when you have nothing, and as a refinement tool when you have a starting colour you love and need scientifically related companions for it.
How many colours do you actually need?
Fewer than you think. A complete, professional interface typically runs on one primary hue, one accent, a success/warning/error trio, and a ramp of neutrals — greys doing the silent heavy lifting of backgrounds, borders and secondary text. Brands feel colourful not because they use many hues but because they use one or two with total commitment. If your palette has six competing brand colours, the design will look busy no matter how skillfully they're applied — the eye needs a hierarchy, and hierarchy requires scarcity. When in doubt, cut the palette down and expand each remaining colour into tints and shades instead; depth within few hues beats breadth across many, in both elegance and maintainability. It is also the approach that survives growth: products accumulate features and pages, and a small palette with clear roles absorbs that growth gracefully where a large one collapses into inconsistency.
A palette is the start — where AdCreative.ai does more
Locking your colours is the foundation, but the work that actually moves revenue is what you build with them: the ads, banners and social creatives that have to stop a scroll while staying on-brand. Producing those in volume — dozens of variants, correctly sized per platform, each using your palette properly — is a production grind. That's where a tool like AdCreative.ai does more: it generates on-brand, conversion-focused ad creatives from your brand kit (colours included) at scale, so the palette you crafted here shows up consistently in every asset instead of drifting with each rushed design. Define the colours here; let generation-at-scale keep them working everywhere.
Frequently asked questions
How many colours should a brand palette have?
Usually one primary, one or two accents, plus neutrals (light and dark). Fewer, used consistently, looks more polished than many colours.
What are hex codes?
Six-character codes like #3b82f6 that specify an exact colour for web and design tools. Copy them straight into your CSS or design app.
How do I turn a palette into ads?
Apply it to your creatives manually, or use a tool like AdCreative.ai that generates on-brand, conversion-focused ad designs for you.
More free generators & utilities
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