colorio

colorio is a color picker(eyedropper) GUI tool, implemented as a node.js module with a native macOS binary that represents GUI layer. It can be used in any stand-alone node.js or Electron.js applications running on macOS.

Installation

$ npm install colorio

Requires macOS 10.12 or later.

Demo

A minimalistic Electron based demo can be found by the following url:

• colorio-electron-example

Features

• Multiple displays support
• Retina displays support
• No dependencies
• Tiny binary -> 59 kb
• Electron integraion out of the box

Usage

const pickColor = require('colorio').pickColor;

pickColor().then((res) => {
    console.log(res);
    //=> on color pick
    // {
    //     "result": "picked",
    //     "color": {
    //         "r": 0.2980392156862745,
    //         "g": 0.6078431372549019,
    //         "b": 0.2980392156862745
    //     }
    // }    

    //=> on hitting `Esc` key
    // {
    //     "result": "canceled",
    // }    
});

NOTE: In Electrion applications this function should be called from the main process.

API

pickColor([options]) => Promise

Executes native binary file and returns a Promise for the result.

Fullfills when user picks color from the screen or aborts the action by hitting Esc key.

options

execPath

Type: string Default: undefined

A custom path to the colorio's binary. Might be helpful in case of custom dev environment setup using webpack. If not set, path is resolved automatically based on __dirname with respect to app.asar.unpacked in case module is used in an Electron app.

Returns

Returns a promise with an object when promise is fullfilled. In case color is picked, the object will look like this, where color property contains r, g, b keys representing rgb color components in 0...1 range (0.0 -> 0, 1.0 => 255):

{
    "result": "picked",
    "color": {
        "r": 0.2980392156862745,
        "g": 0.6078431372549019,
        "b": 0.2980392156862745
    }
}  

In case user cancels the action by hitting Esc key, the resulting object's result's key value will be set to canceled:

{
    "result": "canceled"
}  

Color Management

Currently colorio doesn't support custom color spaces. Picked colors are converted via genericRGBColorSpace, thus the resulting colors might be a bit different from color pickers in other apps.

Maintainers

• Andrey Shakhmin

License

MIT