Extract a website color system from a URL

Contents

• [Capture representative page states](#capture-representative-page-states)
• [Group colors by observable role](#group-colors-by-observable-role)
• [Check contrast and state changes](#check-contrast-and-state-changes)
• [Convert observations into design rules](#convert-observations-into-design-rules)
• [Use this in your AI agent](#use-this-in-your-ai-agent)

A useful website color extractor does more than collect hex values. It identifies which colors repeat across backgrounds, surfaces, text, borders, actions, status messages, gradients, and illustrations, then records where each color appears. The practical result is a palette with roles and usage rules, not a random list of sampled pixels.

Capture representative page states

Use the website's browser extension or another capture workflow to collect the URL, then inspect more than one page state. Include a landing page, a content or product page, and interactive states such as hover, focus, selected, disabled, error, or success when they are visible. A decorative hero can introduce colors that never appear in the working interface, while a form or settings screen often reveals the recurring color rules.

For every important color, record:

• the observed hex value or a close rendered equivalent
• the page, component, and state where it appears
• its role, such as background, text, border, action, or status
• the surface behind it
• whether it repeats and how prominently
• whether it belongs to interface design or artwork

Treat rendered colors as observations. A sampled value does not prove that the original site uses that exact value in a source token file.

Group colors by observable role

Start with roles instead of token names:

• Canvas: page background and alternate section backgrounds
• Surface: cards, panels, fields, and elevated areas
• Foreground: headings, body copy, labels, and disabled text
• Border: dividers, outlines, separators, and input borders
• Action: primary buttons, links, focus indicators, and selected controls
• Status: success, warning, error, and informational feedback
• Decoration: gradients, illustrations, charts, and promotional accents

A compact working palette might look like this:

Mark this as a proposed implementation palette unless the captured site exposes a public token source. The supplied Pangram example shows a muted green direction and includes values such as #496c10, #15502e, #14532d, #233f2a, #2c7a4a, and #799c92. Those values are useful comparison points for dark actions, text, borders, and softer supporting tones, but the evidence does not prove which component uses each value. Verify every role against the captured page.

Check contrast and state changes

Test text against every background where it appears, including cards, buttons, tinted sections, banners, and dark surfaces. Check primary, hover, pressed, focus, disabled, success, warning, and error states separately. A color that works for large heading text may fail for small labels. A muted foreground that works on white may disappear on a tinted surface.

Record contrast context beside the color rather than treating contrast as a property of the hex value alone. Also inspect whether borders are neutral or tinted, whether hover states become lighter or darker, and whether dark sections invert the neutral scale. For gradients, record direction and stop colors. For illustrations, list their main colors separately so they do not automatically become interface tokens.

Convert observations into design rules

Write a usage rule beside each proposed token:

• Use the strongest foreground for headings and essential labels.
• Use muted foreground only for secondary information that remains readable.
• Use the primary color for the main action and keep its state changes distinct.
• Use borders to separate surfaces without competing with body text.
• Keep status colors recognizable without relying on color alone.
• Treat decorative colors as optional until they recur in interface components.

Test the palette on a page background, card, form field, primary button, link, and error message. For a handoff, include the source page, observed value, role, approximate frequency, contrast context, and confidence. Then list which colors were merged, which remained separate, and why. This gives developers a practical starting point while preserving the difference between what the page visibly shows and what you recommend for a cleaner codebase.

Use this in your AI agent

> Inspect the captured website references for repeated colors across backgrounds, surfaces, text, borders, buttons, links, status states, gradients, and illustrations. Group colors by observed role, report hex values and where they appear, compare contrast across relevant states, and propose a compact token set. Clearly separate observed colors from inferred implementation tokens and do not present the result as the website's official internal design system.

Install Fudge for your AI agent to compare captured color roles and page details while building the palette.

Give a color its own token when it repeats, serves a distinct purpose, or needs independent adjustment. Repetition is the simplest test: if the same value appears in buttons, links, and selected controls, it may be a shared action token. Purpose matters too. Error color, muted text, and a card border should not be merged just because their values are close.

Keep one-off illustration colors out of the core palette unless they recur in interface elements. For near-duplicates, record both observations first, then decide whether the difference is visible and useful. If changing one value would make several components wrong, they should probably remain separate. Add a short usage note to every token and recheck it against default, hover, focus, disabled, light, and dark contexts.

Include the page or component where each color appeared, its observed value, visual role, approximate frequency, and the background behind it. Add contrast notes for text and controls, plus separate entries for hover, focus, selected, error, warning, and success states when those states are visible.

A compact report can use columns such as:

Keep gradients and images in their own section. For gradients, record direction and stop colors. For illustrations, list the main colors without promoting them to interface tokens automatically. Finish with a proposed palette and a short decision log explaining which colors were merged, which stayed separate, and why.

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