JA Tool

Color Replace Lite: Guide

Replace “this exact color” with another one (eyedropper, tolerance, zoom, PNG export).

What it does

Pick a source color with an eyedropper and replace it with a target color
Set the target color via HEX, RGB, or presets
Adjust tolerance to control how much “similar colors” are replaced
Zoom for precise picking, then export as PNG

Open the tool 日本語ガイド

Use this when

You want to swap a logo/icon color without touching the background
You need to change a highlight/marker color in a screenshot
You want to quickly try multiple color variations

Keywords: replace color in image, color replacement, eyedropper, hex rgb, png export

How to use

Load an image
Pick the “From” color with the eyedropper
Set the “To” color (HEX/RGB/preset)
Adjust zoom and tolerance until the result looks right
Export as PNG

Runs locally in your browser. No server-side image storage.

Notes (limits)

Photos with smooth gradients may look “smudged” after replacement (tune tolerance).
This tool does not do smart segmentation (e.g., “only background”).
JPEG compression noise can make “the same-looking color” differ per pixel, causing partial replacement.