How to Build a Logo Color Palette and Check Text Contrast

A palette extracted from a logo is a starting point, not a finished website color system. The most common colors in an image do not automatically make readable text, visible controls or a useful background. Build the palette in two passes: first identify the colors, then decide what each color is allowed to do.

Start with a clean source image

Use the clearest original file available. A screenshot may include a surrounding page, shadows or compression artifacts that have nothing to do with the logo. Crop away unnecessary scenery before sampling, and keep a copy of the original file for comparison.

Load your image into the Palette Extractor. Compare the suggested swatches against the actual artwork. A tiny accent can be visually important even if it occupies few pixels. Conversely, a large background region can dominate the extraction without being a brand color you want to reuse.

Give the colors roles

Create a small working table with a color value, an intended role and a tested background. Useful roles include primary text, muted text, page background, panel background and accent. Keep the roles separate even when two of them initially use the same color.

For example, a vivid accent could appear in a palette illustration while a darker companion color is used for links. That is a design decision to test in the interface, not a claim that the extracted palette was wrong. Save approved values consistently so the team does not choose a slightly different swatch on every page.

Test foreground and background as a pair

The Contrast Checker compares two solid colors. Enter the intended text and background values, then inspect both the ratio and the visible sample. Recheck when either color changes. A color cannot “pass contrast” on its own.

For WCAG 2.2 Level AA, ordinary text needs a ratio of at least 4.5:1; large text needs at least 3:1. The large-text definition includes 18-point text or 14-point bold text. Text within a logo or brand name has an exception under this criterion, but ordinary interface text using brand colors does not inherit it. See the W3C explanation of minimum text contrast.

Treat those thresholds as one part of a review. Passing a two-color calculation does not establish that the whole page is accessible. A sample on a flat background also does not measure every point in a photograph, gradient or translucent overlay.

Adjust the role before replacing the identity

If an accent is hard to read as small text, try using it for a larger decorative area and assigning a stronger foreground color to the label. You can also test a different background or a darker companion shade. Keep the approved logo artwork intact unless changing it is part of the redesign brief.

Preview realistic words and sizes. A short label in a heavy font can give a different impression from a paragraph in a thin font. Our typography checklist explains why small-size inspection matters alongside numeric color checks.

Check light and dark contexts separately

Do not assume swapping foreground and background creates a complete dark theme. Review the actual surface behind each item: a page, a card and an input may use different colors. Keep a small list of approved combinations rather than a list of isolated “accessible colors.”

Use Mockup Preview to judge the logo's placement on light and dark scenes. Use the contrast tool for the solid-color text pairs surrounding it. Each answers a different question.

Save a palette that someone else can use

Export the selected colors from the palette tool and add the role names in your project documentation. Record where a combination was tested and where it should not be used. A practical note such as “accent for large decorative shapes; use primary text for small labels” is more useful than an unlabeled strip of swatches.

When the colors are part of a wider redesign, return to the logo redesign checklist and compare the complete identity in its intended settings.