# Rainbow Toolbox — Color Palette Rainbow Tools

> Color palette creation and management tool with advanced editing and image import. (iPhone/iPad app by Iain Berliner.)

- Source: https://appshunter.io/ios/app/rainbow-toolbox/id1665785647 (this page in markdown: same URL + `.md`)
- Developer: [Iain Berliner](https://appshunter.io/developer/1665785649)
- Category: Graphics & Design, Utilities
- Price: Free (on sale, was $0.99)
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.1 · 177 MB
- Languages: English
- Released: 2023-02-11
- Data updated: 2026-06-21
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/rainbow-toolbox/id1665785647/reviews.md

## What is Rainbow Toolbox?

Rainbow Toolbox allows users to create, save, and edit color palettes in a unique, wheel-based interface, with the following tools:
1. Hammer, which can add, delete, modify, and reorder the colors in the palette.
2. Caliper, which can make the colors either more perceptually similar or more perceptually distinct.
3. Balance, which modifies all of the colors simultaneously from a single color-picker.

Other features include:

The Rucksack: stores your palettes in a kitsch, filesystem-like interface replete with search, folder creation, renaming, copy, delete, and sorting buttons.

Creating palettes from images: this app has two distinct algorithms for creating palettes from images. These are kmeans and farthest-first-traversal. Kmeans tries to strike a balance between selecting colors that are common in the image, and making the colors distinct. Whereas, farthest-first-traversal doesn't really care how common each color is in the image, and just tries to pull colors from the image that are as distinct as possible.

Customize the look-and-feel: this app has four interface colors and three backgrounds that are used throughout the app. These can be modified in the settings to the user's liking.

## Key features

- Wheel-based color palette creation
- Perceptual color similarity/distinctness adjustment
- Simultaneous color modification
- Image-based palette generation (kmeans, farthest-first)
- Filesystem-like palette storage
- Customizable interface colors and backgrounds

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/rainbow-toolbox/id1665785647/reviews.md

### 5/5 — Useful!

*2023-02-14*

Great App! It runs quickly and smoothly. No more guessing colors when painting a photo onto canvas.

## Frequently asked questions about Rainbow Toolbox

### What is Rainbow Toolbox?

Rainbow Toolbox is a free application for iOS devices that allows users to create, edit, and manage color palettes using a unique wheel-based interface and advanced color manipulation tools.

### How does Rainbow Toolbox generate palettes from images?

Rainbow Toolbox uses two distinct algorithms: kmeans, which balances common and distinct colors, and farthest-first-traversal, which prioritizes distinct colors from the image.

### Can I organize my color palettes in Rainbow Toolbox?

Yes, Rainbow Toolbox features a 'Rucksack' tool that stores palettes in a filesystem-like interface, allowing for search, folder creation, renaming, copying, deletion, and sorting.

### Does Rainbow Toolbox have ads?

No, Rainbow Toolbox is ad-free, providing an uninterrupted user experience for creating and managing color palettes.

### What devices does Rainbow Toolbox support?

Rainbow Toolbox is available for iPhone, iPad, and iPod touch devices.

### How often is Rainbow Toolbox updated?

The latest version, 2.0.2, was released on August 22, 2024, indicating active development and regular updates.

### What is the age rating for Rainbow Toolbox?

Rainbow Toolbox has an age rating of 4+, making it suitable for a wide range of users.

### How can I adjust the colors in a palette with Rainbow Toolbox?

Rainbow Toolbox offers tools like 'Caliper' to make colors more perceptually similar or distinct, and 'Balance' to modify all colors simultaneously from a single color picker.

## Version history (last 4 releases)

### 2.0.2 — 2024-08-22

Rebranded the app from "Image to Color Palette" to "Rainbow Toolbox" to reflect new functionality. New functionality includes:

1. The ability to save and restore palettes in a filesystem-like interface replete with search, folder creation, renaming, copy, delete, and sorting buttons.

2. Unique, wheel-based representation of color palettes with 3 different tools for editing them.

3. A significantly less flat-looking interface, and the ability to set custom backgrounds, on top of four interface colors.

Note: no features have been removed! If you had the previous version of this app, whatever colors you had set as the interface colors previously have been saved to the Rucksack in a palette named "settings".

Technical details: changed development environment from React Native to the Godot Game Engine, for greater flexibility.

### 1.1.0 — 2023-05-18

Added a new algorithm, 'farthest first traversal'.
Explicitly renamed the old algorithm 'k-means'.
Added a petit user guide explaining both the original and new algorithm in layman's terms.
Made the 'done' button in the settings screen wider.
Removed invisible padding used in some screens, to prevent elements from reaching the iPhone notch,
and switched to using SafeAreaView instead; this makes the amount of padding at the top more consistent
between different phone models.

### 1.0.2 — 2023-02-13

Small bug fix involving the settings screen.

### 1.0.1 — 2023-02-11

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-21.*