Fish Percolator logo


We built to solve a frequent problem we were having when building software: vector graphics for user interfaces are usually black, and many user interfaces need them to be other colours.

This tiny web app allows you to pick a colour, then drag and drop your black images and download the newly recoloured versions.

Features of include:

  • Developed using the lightning-fast Crystal programming language and the Kemal web framework.
  • Webpack-based JavaScript frontend that uses Dropzone and Spectrum
  • No storage backend for the uploaded files - they're delivered in-browser using data URIs.

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