"I'm just not a design person" is what people say right before picking five colors that clash, because they're choosing colors they individually like instead of colors that work as a system. Good color palettes follow rules you can apply without any innate taste at all.

Start from one color, not five

Pick a single base color first, usually your brand color, or whatever feels right for the project's mood. Every other color in the palette should be derived from that one mathematically, not chosen independently by eye. This is the single biggest difference between a palette that feels cohesive and one that feels like five separate decisions.

The four palette structures that actually work

  • Complementary (opposite on the color wheel): high contrast, energetic, good for a single accent color against a neutral base. Two colors, used carefully.
  • Analogous (neighboring hues): naturally harmonious because the colors are close together, safe default for most projects, low risk of clashing.
  • Triadic (three evenly spaced hues): vibrant and balanced, but needs one color to dominate and the other two to act as accents, three equal-weight colors fighting for attention rarely works.
  • Monochromatic(one hue, varying lightness): the safest option of all, impossible to clash since it's technically one color, works well when you want restraint over energy.

A color palette generator that derives all four structures from one base color removes the guesswork of picking the other colors by hand.

Contrast isn't optional, it's accessibility

A palette can look great and still fail real users if text doesn't have enough contrast against its background. The Web Content Accessibility Guidelines set a minimum contrast ratio of 4.5:1 for normal text, and 3:1 for large text, measured against a specific, defined formula, not eyeballed. Low-contrast light-gray-on-white text is one of the most common accessibility failures on the web, and it's also just genuinely harder to read for everyone, not only people with low vision.

Check every text/background pairing in your palette with a contrast checker before finalizing it, not after the design is built and hard to unwind.

Reserve pure black and pure white for extremes

Pure black text (#000000) on pure white (#FFFFFF) has the highest possible contrast, which sounds good but actually causes eye strain during extended reading, the contrast is higher than most print typography ever uses. A very dark gray (something like #111827) on off-white reads more comfortably while still easily clearing accessibility contrast minimums.

Limit yourself to one accent color

A neutral base (usually grays, or a very desaturated version of your brand color) with exactly one saturated accent color for calls-to-action and highlights reads as intentional and calm. Multiple competing saturated colors on the same screen reads as noisy, even if each individual color is nice on its own. If you find yourself wanting a second accent, ask whether it's solving a real hierarchy problem or just because you like the color.

Test the palette in both light and dark contexts

A color that reads as vibrant on a white background can look muddy or overly dark on a dark background, and vice versa. If the project supports both light and dark modes, don't assume one palette works unmodified in both, test contrast ratios separately for each, since the accessibility minimums apply independently to whichever mode a real user actually has active.

The bottom line

A palette that works isn't about having good taste, it's about starting from one color, deriving the rest with an actual color-wheel relationship, checking contrast against a real standard instead of eyeballing it, and limiting yourself to one accent color instead of five competing ones. Every step here is mechanical, not artistic, which is exactly why it's learnable.