Chromabrew

Convert SRM, EBC, or a list of Lovibond values to another color scale, or to a hex color.

Color values are provided by Barley Dog Brewery here

Usage

Install the library:

npm install --save chromabrew

Require the module:

let chromabrew = require('chromabrew');

Pass options which describe a batch to the Batch constructor, or directly to the required module. See the list of accepted options below. Call hex on the returned object to get a color:

new chromabrew.Batch({ srm: 4 }).hex();
// => '#ECE61A'
 
chromabrew({ srm: 4 }).hex();
// => '#ECE61A'
 
chromabrew({ ebc: 4 }).hex();
// => '#F8F753'

Convert between color scales:

let batch = chromabrew({ srm: 4 });
 
batch.srm();
// => 4
 
batch.ebc();
// => 7.88
 
batch.mcu();
// => 4.210535199414287
 
batch.lovibond();
// => 3.407407407407407

Specify which calculation method was used to determine the provided srm or ebc, or which method to use when converting between scales:

let batch = chromabrew({ srm: 14, calculator: 'daniels' });
 
batch.srm('daniels');
// => 14
 
// defaults to 'morey'
batch.srm();
// => 14.670088349307665
 
batch.srm('mosher');
// => 13.099999999999998
 
// defaults to 'morey'
batch.ebc();
// => 28.9000740481361
 
batch.hex('daniels');
// => '#B26033'
 
// defaults to 'morey'
batch.hex();
// => '#A85C37'

Options

Primary Options

Any one of the following options must be passed to the module:

This option may be used in combination with a known color value (srm, ebc, or l) to specify which calculation method was used:

† apparently they let anyone create a beer color scale

Batch Options

The following options define the batch primary option:

Ingredient Options

The following options define each ingredient in the ingredients batch option:

Functional Domain

The domain of valid inputs is 0 through 40 SRM. Input values are rounded to the nearest 0.1 SRM within this domain:

chromabrew({ srm: -1 }).hex() === chromabrew({ srm: 0 }).hex();
// => true
 
chromabrew({ srm: Number.MAX_VALUE }).hex() === chromabrew({ srm: 40 }).hex();
// => true
 
chromabrew({ srm: Math.PI }).hex() === chromabrew({ srm: 3.1 }).hex();
// => true  

The 'daniels' and 'mosher' SRM calculation scales have a minimum result of 8.4 and 4.7, respectively. Where a provided srm would result in a negative mcu, the mcu is set to 0:

let daniels = chromabrew({ srm: 4, calculator: 'daniels' });
 
daniels.mcu();
// => 0
 
daniels.srm();
// => 0
 
daniels.srm('daniels');
// => 8.4
 
let mosher = chromabrew({ srm: 4, calculator: 'mosher' });
 
mosher.mcu();
// => 0
 
mosher.srm();
// => 0
 
mosher.srm('mosher');
// => 4.7