What is a custom color shader?

A small WGSL function that runs on every pixel, taking the input color and returning a new one. It lets you build your own color effects.

Which color spaces can I use?

Choose separate input and output representations, such as sRGB or Oklab, so your math runs in the space that suits the effect.

What effects can I make?

Sepia, hue rotation, channel swaps, posterization, saturation boosts, inversion, thresholds, and any other per-pixel color change.

What file formats can I export?

You can export as PNG, JPEG, WebP, TIFF, BMP, or HEIC.

Is this tool free to use?

Yes — completely free, no account needed. Your images are processed entirely in your browser and never uploaded to a server. Downloads have no watermarks.

← Online Color Effect Tools

Custom Color Shader Online

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What you can expect

Write your own color transformer shader to change every pixel of an image. Choose the input and output color space, then write a short WGSL function body to create effects like sepia, hue shifts, channel swaps, posterization, and more.

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Online Color Effect Tools

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Frequently asked questions

What is a custom color shader?: A small WGSL function that runs on every pixel, taking the input color and returning a new one. It lets you build your own color effects.
Which color spaces can I use?: Choose separate input and output representations, such as sRGB or Oklab, so your math runs in the space that suits the effect.
What effects can I make?: Sepia, hue rotation, channel swaps, posterization, saturation boosts, inversion, thresholds, and any other per-pixel color change.
What file formats can I export?: You can export as PNG, JPEG, WebP, TIFF, BMP, or HEIC.
Is this tool free to use?: Yes — completely free, no account needed. Your images are processed entirely in your browser and never uploaded to a server. Downloads have no watermarks.

For developers

Use Custom Color Shader from Python

Open the Jupyter notebook example to see how to run this tool from the BrushCue Python API, inspect the processing steps, and adapt the workflow for scripts or batch image jobs.

View Python notebook

Build your own

Custom Color Shader Online

What you can expect

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Frequently asked questions

Use Custom Color Shader from Python

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