Color Replace Tool

Purpose & User Intent: The Color Replace Tool recolors images by substituting a target color with a replacement color while preserving shading as much as possible. Intended for graphic designers, marketing teams, and asset managers requiring brand-color consistency across icons, illustrations, and photographs. It speeds updates across many assets and reduces manual masking.
Core Logic & Features: The tool computes perceptual color distance and applies replacements within a user-defined tolerance. Required inputs: image, target color, replacement color. Optional/advanced: multiple mappings, luminance-preserving option, color-space selection (sRGB/ LAB), and batch processing. Outputs are edited images with the same format when possible.
Inputs & Outputs: Supports PNG, JPEG, WEBP; output in same format or PNG; validation ensures color syntax correctness; images large enough to require streaming. Outputs include the final image file and optional metadata about the mappings.
Algorithms & Calculations: Pixel-wise distance in perceptual color space (Delta E2000) determines matches; if distance <= tolerance, replace color; preserve luminance as a secondary mapping to reduce shading shifts; supports sequential mappings.
Error & Edge Cases: If no pixels meet tolerance, image unchanged; invalid color specifications produce domain errors; alpha channels preserved; extremely low/high tolerance may yield no effect or drastic changes; large images may need chunked processing.
Industry/Region & Localization: Aligns with standard sRGB workflows; uses hex or RGB color inputs; no locale-specific constraints beyond color formatting.
Assumptions & Exclusions: Assumes standard RGB images with color data; excludes video processing, masking, or advanced texture synthesis; not responsible for color accuracy on all devices. Example: replace target color #1E6EF3 with #16A34A at tolerance 15 to adapt a logo to a brand variant.