Question 1

How does the colour matching work?

Accepted Answer

Each pixel is compared to your target colour using Euclidean distance in RGB space. Pixels close enough to the target keep their colour; everything else is converted to grayscale using the standard luminance formula. The tolerance slider controls how forgiving the comparison is — higher tolerance keeps a wider range of related shades.

Question 2

Can I keep more than one colour?

Accepted Answer

Run the tool twice — first save the splash with colour A, then re-upload that result and splash colour B. Because both passes preserve grayscale pixels, the second pass will only re-colour areas that match colour B, leaving colour A from the previous pass intact.

Question 3

Best photos for colour splash?

Accepted Answer

Subjects that already pop against a relatively neutral background — a red dress in a city street, a yellow umbrella in a crowd, a green door in a stone wall. The more isolated the colour, the more dramatic the result.

Question 4

Does the tool detect just hue or also brightness?

Accepted Answer

It compares full RGB, so a pale pink and a deep red are treated as different colours even though they share a hue. To keep all reds, dial the tolerance up — to keep only one specific shade, dial it down.

Question 5

Why is in-browser image processing slower than online editors?

Accepted Answer

Server-side editors run on dedicated CPUs and GPUs with native code paths and parallel workers. Our engine uses the HTML5 Canvas API running single-threaded inside your browser tab, which is typically 2–5× slower than a backend pipeline. The trade-off is total privacy: your image is never uploaded, never logged, never stored on a third-party server. Closing the tab erases everything from memory immediately. For most photos, screenshots, and graphics the wait is small, and for sensitive material — work documents, ID scans, private photos — the privacy gain is well worth the few extra seconds.

Question 6

Is my image uploaded to a server?

Accepted Answer

No. Everything runs entirely inside your browser tab using the HTML5 Canvas API and JavaScript. The file is decoded into local memory only, processed in the same tab, and the result is offered as a direct download. Nothing is transmitted to any server, no account is required, no analytics are tied to your file, and closing the tab discards every byte from memory.

Question 7

How big a file can I process?

Accepted Answer

Up to 25MB and roughly 64 megapixels by default. The limit exists because every pixel needs to fit inside your tab's memory. Most phone photos, screenshots, and design exports sit comfortably under that ceiling. If your image is larger, resize or compress it first (try our Resize Image or Compress Image tools) before re-running the effect.

Question 8

Which input image formats work?

Accepted Answer

JPG, PNG, WebP, GIF, BMP, AVIF, HEIC, and most other formats your browser can decode natively are supported. Output is typically PNG (lossless, preserves transparency) or JPG (smaller file size for photos). Some tools expose a format picker so you can match the file type your downstream app expects.

Question 9

Does the effect lose quality?

Accepted Answer

PNG output is lossless — every pixel the canvas wrote out is encoded exactly as drawn. JPG output is recompressed (visually near-lossless above 85% quality). The effect itself works on raw pixels, so there is no double-encoding penalty as long as you keep the default PNG output.

Question 10

Which browsers are supported?

Accepted Answer

Recent Chrome, Edge, Firefox, Safari, and other Chromium-based browsers all work. The tool only relies on the standard HTML5 Canvas API, which has been universally supported for over a decade. Mobile browsers work too, although large images may take noticeably longer because phone CPUs are weaker than desktop CPUs.

Question 11

Is there a watermark or sign-up wall?

Accepted Answer

No. The tool is completely free, requires no account, attaches no watermark, applies no rate limits, and shows no popup ads on your output. The download is the file you would get from running the same canvas operation locally — nothing more, nothing less.

Question 12

Does Color Splash Effect work on a phone or tablet?

Accepted Answer

Color Splash Effect runs in any modern mobile browser — Safari, Chrome, Firefox and the in-app browsers in most messaging apps all support the underlying APIs. Performance depends on the device: a recent phone handles typical inputs nearly as fast as a laptop, while older devices may take a few seconds longer near the 0 MB ceiling. The interface lays out cleanly on small screens, so you do not need to pinch-zoom to see the controls.

Question 13

Will Color Splash Effect ask me to pay to download the result?

Accepted Answer

Color Splash Effect is free to use. The processing runs in your browser, which keeps the per-user cost low enough that the tool can be offered openly. The download is the same file the engine produced — you can use it for as many runs as you need.

Question 14

How accurate is Color Splash Effect?

Accepted Answer

Color Splash Effect is built on standard browser APIs, which is the same class of engine used by professional image editing and conversion pipelines. For deterministic operations, the output is byte-identical to what an equivalent CLI run would produce; for operations involving a codec or a model, the result is well within the range of what comparable tools generate. If you have a specific reference output you need to match, run a small test job first to confirm the configuration produces what you expect.

Question 15

Is the source for Color Splash Effect available?

Accepted Answer

Color Splash Effect is a static page running an open-source engine in your browser, so a typical corporate firewall does not get in the way as long as it allows JavaScript to load from Favtoo. For teams that need to host it themselves on an internal network, the underlying engine (standard browser APIs) is open-source and can be packaged into a private build with the same behaviour. Reach out via the Contact page if that is something you are exploring.

Question 16

Are there any usage limits on Color Splash Effect?

Accepted Answer

Inputs are capped at 0 MB per file, which keeps memory usage stable across phones, tablets and older laptops. You can run Color Splash Effect as often as you need; every run produces a full-quality result.

Question 17

How do I know I am using the latest version of Color Splash Effect?

Accepted Answer

Color Splash Effect is updated whenever the underlying engine releases an improvement or a bug fix. Because the tool is delivered as a static page, every visit fetches the latest version automatically — there is no "version" to manage on your end. If a particular release ever changes default behaviour, the change is documented on Favtoo's changelog so you can confirm what shifted.

Question 18

Is Color Splash Effect keyboard accessible?

Accepted Answer

Color Splash Effect uses native HTML controls wherever possible, which means keyboard navigation, focus rings, and screen-reader labels work the way the platform expects. The drop zone accepts files via the keyboard-accessible file picker as well as drag-and-drop, and result downloads use standard browser download flows. If you spot an accessibility gap, Favtoo treats it as a bug worth fixing.

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