Generate harmonious color palettes from any base color. Get complementary, analogous, and triadic color schemes with HEX, RGB, and HSL values — free tool.
Color Palette Generator is a free, browser-based tool
from UseToolSuite's
Color & CSS Tools collection.
All processing happens locally on your device — your data is never uploaded to any server.
Use the tool below, then scroll down for detailed documentation, frequently asked questions, and related resources.
What is Color Palette Generator?
Color Palette Generator is a free online tool that creates a set
of five harmonious colors from any base HEX color you provide.
Using established color theory principles, it generates a
complementary color, two analogous colors, and a triadic variant
alongside your original base color. Each color is displayed as a
visual swatch with its HEX, RGB, and HSL values, making it easy
to copy exact values into your CSS, design tool, or style guide.
All processing happens entirely in your browser with no server
requests.
When to use it?
Use the Color Palette Generator when you have a primary brand
color and need to build a cohesive color scheme around it. It
saves time compared to manually rotating hue values on a color
wheel. It is especially useful during the early stages of UI
design when you need accent, secondary, and contrast colors that
naturally complement your chosen base, or when refreshing an
existing brand palette.
Common use cases
Designers and developers commonly use Color Palette Generator to
build design token color scales from a single brand color,
create accessible color combinations for buttons and text
against various backgrounds, generate complementary accent
colors for charts and data visualizations, explore triadic and
analogous palettes for creative projects and illustrations, and
quickly export color values in multiple formats for use in CSS
variables, Sass maps, or Tailwind configuration files.
Color harmony rules for palette generation
Color theory provides systematic approaches to building harmonious palettes. Complementary colors sit opposite on the color wheel (e.g., blue and orange), creating maximum contrast. Analogous colors are adjacent (e.g., blue, blue-green, green), producing calm, cohesive palettes. Triadic colors are equally spaced at 120° intervals, offering vibrant variety. Split-complementary uses a base color plus the two colors adjacent to its complement, providing contrast with less tension. For UI design, start with a primary brand color, generate a complementary accent, then derive neutral grays by desaturating the primary — this creates a cohesive system where even the grays feel connected to the brand.
Harmonies set the hues
Color harmonies are relationships on the color wheel, and each produces a different mood:
| Harmony | Relationship | Feel |
|---|
| Complementary | Opposite (e.g. blue/orange) | High contrast, energetic |
| Analogous | Adjacent (~30° apart) | Calm, cohesive |
| Triadic | Three evenly spaced | Vibrant, balanced |
| Split-complementary | Base + two near its opposite | Contrast, less tension |
These are the starting point — they choose which colors go together. But a harmony alone isn’t a UI palette; it’s the seed for the tint/shade scales described above.
Build the neutral ramp first
The most overlooked part of a palette is the grays. Text, borders, dividers, disabled states, and backgrounds are nearly all neutral, so a good gray scale (from near-white to near-black, often slightly tinted toward your brand hue for warmth) carries most of the interface. Get the neutrals right and the few accent colors land cleanly on top.
Watch contrast as you go
Two palette pitfalls are really accessibility pitfalls. Complementary pairs can be striking but often share similar luminance — pure red (#FF0000) and pure green (#00FF00) are complements yet only hit ~1.4:1 contrast, failing as text/background. Analogous palettes drift into sameness if the hues are too close (keep ~30° apart) and the lightness values don’t vary. The fix for both is deliberate lightness separation — pair a light value against a dark one and verify with a contrast checker before committing.
Screen vs print
If a palette is bound for print, remember sRGB (screen) has a wider gamut than CMYK (ink). Neon and highly saturated colors that glow on screen turn dull in print because they fall outside the CMYK range. For print-bound palettes, keep saturation moderate (roughly S < 85% in HSL). Each color here is shown in HEX, RGB, and HSL so you can copy whichever your tool or stylesheet needs.
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