Rainbow Art for Mac

What Rainbow Art does

Keep one colour vivid
Turn the surrounding scene monochrome while the hue you choose stays in colour. Refine the edges with Paint and Erase brushes.
Replace one hue in place
Sample a colour, choose a new one and adjust tolerance. Include and Exclude brushes correct the area while the photo's shading stays.
Compare effects before applying
Audition ten artistic effects with adjustable intensity. Compare Current and Proposed, then choose Apply or Cancel.
Follow each change
The Colour Stack lists the Photo, Splash, Replace and Effect stages in order. Undo and Redo revisit earlier decisions.

Step 1 of 4
Open a photo or example
Start from your own photo or one of six editable examples.
Step 2 of 4
Paint the colour to keep
Use Color Splash with the Paint and Erase brushes to set the selection.
Step 3 of 4
Replace or add an effect
Use Color Replacement to sample and change a hue, or Effects to try a look.
Step 4 of 4
Preview and save
Choose the long edge size and format, then check the dimensions and file size before saving.

Opens your own photos and saves PNG, JPEG, TIFF or BMP at original size or a 2048 or 1080-pixel long edge.

Does it change my original photo?

No. Apply and Cancel decide what is kept, and the image you review is the image saved.

Can it edit several photos at once?

No. It edits one photograph at a time and is not a batch processor.

Can it remove a subject automatically?

No. It is not an AI subject remover.

Version 2.0 · Oct 30, 2026

Rainbow Art 2.0 makes selective-color photos easier to control from first edit to finished image.

Install and refund help for each store, and a form that reaches the developer.