Choosing colors for UI design: a practical workflow

Start with roles, not colors

Before choosing specific hex values, define the roles your palette needs to fill. Most interfaces require at least these: a background (the dominant surface), text (readable against that background), and a primary (the color that carries the most brand weight and interactive emphasis).

Beyond those three, common additions include: surface (cards and elevated areas), muted (secondary text and de-emphasized elements), accent (highlights, badges, secondary actions), and border (structural separation).

Thinking in roles before choosing swatches keeps you from the common trap of picking five colors you like and then struggling to apply them.

Generate or curate a starting palette

You can begin from several starting points. The Palette Generator creates harmony-based palettes — lock a color you already have and regenerate the rest until the combination feels right. If you're starting from a brand image or mood reference, the Image to Palette tool extracts real-world colors you can refine.

Or browse UI-ready palettes in Huelib's curated library and start from something tested. Whichever path you take, aim for a palette of 5–7 values — enough to cover the core roles without overcomplicating early decisions.

See it on real layouts

A palette that looks good as a row of swatches can fall apart when applied to actual UI surfaces. The Palette Visualizer previews your colors on interface, brand, editorial, and other layout scenes, automatically assigning them to appropriate roles. This step catches problems early — a background that overpowers text, an accent that clashes with primary, a surface color that provides too little separation.

This is especially useful before presenting color options to stakeholders. A contextual preview communicates intent far better than a swatch grid.

Map colors to semantic tokens

Once you're confident in the palette, the next step is mapping colors to semantic names your codebase can use. The Semantic Token Mapper lets you assign each color to a role — --color-primary, --color-background, --color-text — and export as CSS variables, JSON tokens, or Tailwind config.

This bridges the gap between "palette" and "design system." Instead of scattering hex values across your stylesheets, every color reference goes through a named token. Themes become swappable, intentions become clear, and refactoring becomes dramatically simpler.

Test accessibility before shipping

Before finalizing, run the palette through accessibility testing. The Palette Accessibility Audit checks every color combination against WCAG contrast standards. The Color Blindness Simulator shows whether your UI colors remain distinguishable under different forms of color vision deficiency.

Common issues at this stage: text colors that technically pass contrast but feel strained at small sizes, status colors (green/red) that collapse under red-green deficiency, and surface/border colors that lack enough distinction to define layout structure.

Most of these are fixable with small lightness or saturation adjustments, not full palette redesigns. See the accessibility guide for a detailed workflow.

The short version

Define roles first. Generate or curate a starting palette. Preview it on real layouts. Map colors to semantic tokens. Test accessibility. Adjust and repeat. The entire cycle can take less than an hour and saves significant time downstream.