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How to Use Just Color Picker for Logo Colors

Sample logo colors with Just Color Picker, record accurate HEX and RGB values, and turn them into a clean swatch palette for vector logo artwork.

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Contents
  1. The Short Answer
  2. Key Terms Used in This Guide
  3. Before You Start: Conditions That Affect Accuracy
  4. Step-by-Step: Sampling Logo Colors
  5. Sampling Typography in a Logo
  6. Recording the Palette
  7. Applying the Colors to Vector Artwork
  8. Export Considerations by Use
  9. Why Sampled Colors Are Not Print Specifications
  10. How to Confirm the Result
  11. Gaps to Be Aware Of

The Short Answer

Just Color Picker is a small desktop utility that reads the color of any pixel on your screen and reports it as numeric values such as HEX and RGB. For logo work, you use it to capture colors from a reference image or on-screen artwork. You then enter those values as named swatches in your vector editor and apply them to the logo's paths and type.

The tool reports what your screen displays, not the color defined in the original artwork. Treat each sampled value as a close starting point. It is not an official brand specification, and it is not a print-ready color.

Key Terms Used in This Guide

  • HEX: a six-character code, such as #RRGGBB, that describes a screen color. It is commonly used for web and digital delivery.
  • RGB: red, green and blue values that describe light-based screen color.
  • CMYK: cyan, magenta, yellow and black. These are the process ink values used in most print workflows.
  • Spot color: a premixed ink, often specified from a matching system such as Pantone, that is printed as its own plate rather than built from CMYK.
  • Swatch: a saved, named color in a vector application that you can reapply consistently.
  • Global color: a swatch linked to every object that uses it, so editing the swatch updates all of those objects at once. The exact name and behavior vary by application.
  • Anti-aliasing: the blended in-between pixels a screen draws along curved or diagonal edges to make them look smooth. These pixels do not hold the true fill color.

Before You Start: Conditions That Affect Accuracy

  • Confirm you have the right to reproduce the logo and its colors. Sampling a color does not grant permission to reuse a brand's identity.
  • Check whether an official brand guide exists. Published HEX, RGB, CMYK or spot values always take priority over sampled ones.
  • If you have the editable vector file, read the fill values directly in your vector editor instead of sampling the screen. A file extension such as .svg, .ai, .eps or .pdf does not by itself prove the file contains editable vector paths, so open it and inspect the objects.
  • Use the cleanest source available. Lossless images such as PNG or a vector preview give more reliable readings than compressed JPEGs, which add color noise and block artifacts.
  • View the source at 100% zoom or larger. Scaled-down images blend neighboring colors together.
  • Turn off night-light, blue-light filters and similar display color effects while sampling, because they can change the pixels being read.

Step-by-Step: Sampling Logo Colors

Menu names, default hotkeys and available color formats can differ between Just Color Picker versions and between the Windows and macOS builds. Check the program's own settings or help for the version you have installed before relying on a particular shortcut.

  • 1. Open the logo source image and enlarge it so each color area fills a good portion of the screen.
  • 2. Launch Just Color Picker and choose the output formats you need. HEX and RGB are the most useful for digital artwork.
  • 3. Move the cursor over a flat, solid area of the first logo color, well inside the shape and away from its edges.
  • 4. Use the program's magnifier or zoom view to confirm the cursor sits on uniform pixels, not on anti-aliased edge pixels or compression artifacts.
  • 5. Capture the color using the hotkey or button your version provides. Capturing with a key lets you record the value without moving the cursor.
  • 6. Sample the same color at two or three other points. If the readings differ, the source is compressed, shaded or a gradient. Use the most consistent value, or record the range.
  • 7. Repeat for each distinct logo color, including the text color and any outline or background color.
  • 8. Copy the values into a palette record, or save them through the program's history or save function if your version has one.

Text is the easiest place to get a wrong reading. Thin strokes and small type consist mostly of anti-aliased edge pixels, so their sampled color is often lighter or muddier than the real fill.

Take readings from the thickest part of the largest letter, such as a vertical stem or a heavy bowl, at high magnification. If a wordmark uses the same color as a symbol elsewhere in the logo, sample the larger solid shape and compare the two readings.

Recording the Palette

Keep a simple record that separates sampled values from confirmed specifications, so no one later mistakes an estimate for an official color. A plain-text template like the following works well:

Logo palette - [client or project name]
Source: [file name], sampled at [zoom level]

Name          HEX       RGB            Status
Primary       #______   ___, ___, ___  sampled / confirmed
Secondary     #______   ___, ___, ___  sampled / confirmed
Text          #______   ___, ___, ___  sampled / confirmed
Background    #______   ___, ___, ___  sampled / confirmed

Print values (CMYK / spot): [from brand guide or press proof only]

Applying the Colors to Vector Artwork

  • 1. Set the document color mode to match the main delivery target: RGB for screen and web, CMYK for process print. Spot-color artwork needs the spot swatches defined separately.
  • 2. Create one named swatch for each palette color by typing in the recorded HEX or RGB values. Where your application supports it, make each one global so later edits update every object that uses it.
  • 3. Select each closed path, compound path and outlined or live text object, and apply the matching swatch as its fill or stroke.
  • 4. Check for stray objects with similar but unswatched colors, for example a fill that is one value off. Merge them onto the correct swatch.
  • 5. Decide whether to keep text live or convert it to outlines for delivery. Outlining removes font dependency but makes the text no longer editable, so keep a live-text master copy.

Export Considerations by Use

Delivery use | Color values to use | Notes
Web and app (SVG, PNG) | HEX or RGB | Export in the sRGB color space so browsers show colors as intended.
Office documents and presentations | RGB or HEX | Supply a PNG with a transparent background alongside the vector file.
Process print (PDF, EPS) | CMYK from a brand guide or proof | Do not rely on an automatic RGB-to-CMYK conversion of sampled values.
Spot-color print | Named spot swatches | Spot values must come from an official specification or matching guide, not from screen sampling.

Why Sampled Colors Are Not Print Specifications

Just Color Picker may display CMYK or other converted values, depending on your version. Those numbers are calculated from screen RGB using a generic formula. They do not reflect the ink, paper, press or color profile a printer will use.

A screen also cannot reveal which spot color the original designer specified. For print-critical work, obtain CMYK or spot values from the brand owner, or confirm them with a physical proof.

How to Confirm the Result

  • Re-sample your finished vector artwork with Just Color Picker at 100% zoom and compare the readings to your palette record. Flat interior areas should match the recorded HEX values.
  • Open the swatch or document color list in your vector editor and confirm it contains only the intended palette colors, with no near-duplicates.
  • Place the new artwork beside the original reference on the same screen and compare them visually for obvious shifts.
  • Preview the logo in grayscale to check that the colors still separate clearly by lightness.
  • For print files, use your application's separations or output preview, if available, to confirm each color lands on the expected CMYK or spot plates.
  • Mark every value in your record as either confirmed from an official source or sampled, so anyone receiving the files knows which colors still need verification.

Gaps to Be Aware Of

This guide does not list specific version numbers, default hotkeys, supported formats or system requirements for Just Color Picker, because those were not confirmed for this article. Check the installed version's settings and documentation for exact commands.

Accuracy also depends on your display, operating system color management and source image quality. No sampled value should be presented as a brand's official color without confirmation from the brand owner.