Generate a color palette from an existing logo

The short answer

You can build a color palette from an existing logo in two ways. The first is to read the color values defined in the logo's vector artwork. The second is to sample colors from an image of the logo with a palette generator or an eyedropper tool. Reading the vector data gives you the exact values the designer specified. Sampling an image only gives you estimates. Before you trust either result, find out what kind of file you have and whether the owner has published official color specifications.

Note on scope: no specific logo, tool, or product was named for this article, and no tool-specific evidence was provided. What follows covers general, verifiable principles. It does not review or compare named palette generators.

Why the file type changes the answer

A palette generator that works from an uploaded image analyzes pixels. A vector logo file works differently: it describes shapes and stores each fill and stroke color as a defined value. The two approaches produce different kinds of results, so it matters which one you are dealing with.

• Vector artwork: shapes are defined as paths with assigned fill and stroke colors. You can select each object in a vector editor and read its exact value, usually as a hex code, RGB, CMYK, or a named spot color.
• Embedded raster image: a vector-format file such as SVG, PDF, EPS, or AI can contain a placed bitmap instead of editable paths. You cannot read a defined color from a bitmap. You can only sample its pixels, just as you would with a photo.
• Raster preview: many vector formats also include a low-resolution preview image, and some file viewers show that preview rather than the artwork. Sampling colors from a preview gives approximate values.

The file extension does not tell you which of these you have. A file ending in .svg, .eps, .pdf, or .ai may hold real vector paths, a single embedded image, or a mix of both. To confirm, open the file in a vector editor and use an outline or wireframe view. Vector paths show up as editable outlines. An embedded image shows up as a single rectangular box.

Extracting colors from true vector artwork

Once you have confirmed editable paths, read the colors directly from the artwork instead of sampling them:

• Open the file in a vector editor and look at the document swatches or color groups. Some designers save the brand palette there.
• Select each distinct shape and note its fill and stroke values. Watch for gradients, which contain several color stops rather than one color.
• Check for spot or named colors. If one is used, record the name as well as its screen equivalent, because the name is what a printer needs.
• Note the document color mode (RGB or CMYK). The same artwork can show different numeric values depending on the mode.
• For SVG files, you can read the color attributes in the markup itself.

The illustrative SVG fragment below shows where those values appear. The colors are placeholders and do not come from any real logo.

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 80">
  <rect x="0" y="0" width="80" height="80" fill="#1A4E8A"/>
  <path d="M100 20 L180 20 L140 70 Z" fill="#F2A900" stroke="#222222"/>
</svg>

The URL inside the xmlns attribute is the standard SVG namespace declaration that every SVG file includes. It is not a link to a resource.

Extracting colors from a raster image

If you only have a PNG, JPG, screenshot, or a vector file that wraps a bitmap, an image-based palette generator is a reasonable starting point. Treat its output as an estimate, for these reasons:

• Anti-aliasing blends edge pixels with the background, which creates in-between colors that are not part of the design.
• JPG compression shifts colors and adds artifacts, especially around sharp edges and flat areas.
• Color profiles and display settings can change how a color is stored or shown.
• Automatic generators may merge colors that are close together or include background and shadow tones as palette entries.

You can reduce these errors by sampling from the center of large flat areas rather than from edges, and by using the largest, least-compressed version of the image you can find. Even then, the values are approximations of the original specification.

Converting between color spaces

A color you extract will usually be in one color space: hex or RGB for screens, CMYK for process printing, or a spot color reference for specific inks. Converting between them is not exact. Converting a screen color to CMYK, or estimating a spot color from a hex value, depends on profiles and printing conditions. If the logo owner publishes official values for each color space, use those instead of converting values yourself.

Source	What you get	Reliability
Official brand guidelines	Specified values per color space	Authoritative
Editable vector paths	Exact values as defined in the file	Exact for that file's color mode
Embedded raster or preview inside a vector file	Sampled pixel colors	Approximate
PNG, JPG, or screenshot	Sampled pixel colors	Approximate, affected by compression and edges

Extending the extracted colors into a working palette

Most logos use only a few colors, which is often not enough for a full set of interface or print materials. A common approach is to keep the extracted logo colors as the core palette and add lighter tints, darker shades, and neutral colors around them. Any colors you add this way are your own design choices, not part of the original brand specification. Label them that way so nobody mistakes them for official brand values. If the palette will be used for text or interface elements, check the contrast between foreground and background colors.

Permission is a separate question

Having a logo file, or being able to download one, does not mean you are allowed to modify the artwork, reuse its typefaces, or use the mark itself. Pulling colors to study a design or to match a client's existing brand is different from creating material that copies or imitates someone else's identity. Logos are often protected as trademarks, and the fonts in them usually come with their own licenses. If you are working on behalf of the brand, ask for its official guidelines and source files. If you are not, review the owner's usage terms before you reuse their colors or artwork.

What this article does not cover

No specific palette generator, software version, or logo was provided, so this article does not compare tools, list prices, or describe step-by-step menus for any particular application. The cultural meanings of individual colors are also outside the scope of this question. Those meanings vary by region and context and should be researched separately for the audience a palette is meant to reach.