How is this different from the Color Remover?

The Color Remover deletes matching pixels and keeps everything else. This tool does the opposite: it keeps only the matching pixels and makes everything else transparent, isolating that one color as its own layer.

What happens to the alpha of matching pixels?

Matching pixels keep their exact original color and alpha; only non-matching pixels have their alpha forced to 0.

Can I separate multiple colors into multiple layers?

Run the tool once per color you want to isolate, each time targeting a different color, to build up a separate transparent-background layer for each.

Why would I want a single color as its own layer?

It's useful for print separations, inspecting how much of an image a specific color actually covers, or repurposing just one element of a multi-color logo or illustration.

PNG Colors Separator - Isolate a Single Color Layer Online

Overview

Introduction

This tool isolates a single color from a PNG into its own transparent-background layer, entirely in your browser.

It's the mirror image of removing a color: instead of deleting a color, it deletes everything except that color.

What Is PNG Colors Separator?

A client-side color isolation tool that reads an uploaded PNG's pixel data, keeps pixels within a chosen tolerance of a target color untouched, and makes every other pixel fully transparent.

The result is effectively a single 'layer' containing only that one color, ready to composite, inspect, or export on its own.

How PNG Colors Separator Works

For every pixel, the tool measures the Euclidean distance between its RGB value and the target color. Pixels within the tolerance are left completely unchanged; pixels outside it have their alpha forced to 0.

Because matching pixels are never modified, their original color and any partial transparency they already had is preserved exactly.

When To Use PNG Colors Separator

Use it to pull one color out of a multi-color logo or illustration for separate use, to inspect exactly how much area a specific color covers, or to prep a color separation for screen printing.

It's also useful paired with the Color Remover when you want both the isolated color and the rest of the image as two complementary layers.

Often used alongside PNG Color Remover, Color Pixels Highlighter and PNG Color Channels Extractor.

Features

Advantages

Preserves the matched pixels' original color and alpha exactly, with no re-coloring.
Produces a clean transparent-background layer ready to composite elsewhere.
Runs entirely client-side; your image never leaves your device.

Limitations

It isolates one color per run; a multi-layer separation requires running the tool once per color.
A tolerance that's too high can pull in unrelated similar-looking colors along with your intended target.

Examples

Isolate a logo's accent color

Input

A two-color logo PNG, target #ff6600, tolerance 15

Output

Only the orange accent shapes remain, everything else transparent

A moderate tolerance captures the accent color's anti-aliased edges along with its solid fill.

Prep a print color separation

Input

A flat-color illustration PNG, target #003366, tolerance 5

Output

A layer containing only the navy-blue shapes, ready for a single print run

A tight tolerance ensures only the exact intended ink color is isolated for screen printing.

Best Practices & Notes

Best Practices

Use the Palette Extractor first to identify exact hex values worth isolating, rather than guessing.
Keep tolerance low for print-separation use cases where color accuracy matters most.

Developer Notes

The isolation logic shares its distance-matching approach with the Color Remover, Color Changer, and Colors Swapper tools, but inverts which pixels get modified; it's a pure function over a Uint8ClampedArray pixel buffer with no DOM dependency.

PNG Colors Separator Use Cases

Pulling a single color out of a multi-color logo for standalone use
Prepping color separations for screen printing
Auditing how much visual area a specific color occupies in a design

Common Mistakes

Confusing this with the Color Remover, which does the opposite (deletes the matched color instead of isolating it).
Using too high a tolerance and unintentionally isolating unrelated similar shades alongside the intended color.

Tips

Pair with the Color Remover to split an image into two complementary transparent layers: one with just the target color, one without it.
For a visual preview instead of an isolated layer, try the Color Pixels Highlighter, which dims non-matches instead of removing them.

PNG Colors Separator