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.
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();
// => 3.407407407407407Specify 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'Any one of the following options must be passed to the module:
| option | description | type |
|---|---|---|
srm |
the SRM of a batch | Number |
ebc |
the EBC of a batch | Number |
l or lovibond |
the degrees Lovibond of a batch | Number |
batch |
options describing a batch in detail (see below) | Object |
This option may be used in combination with a known color value (srm, ebc, or l) to specify which calculation method was used:
| option | description | type |
|---|---|---|
calculator |
the SRM calculation method used: 'morey' (default), 'daniels', 'mosher', or 'barry' † |
String |
† apparently they let anyone create a beer color scale
The following options define the batch primary option:
| option | description | type |
|---|---|---|
mcu |
the MCU of the batch, if it is already known | Number |
v or volume |
the total liquid volume of the wort (required) | Number |
ingredients |
an Array of ingredient options (see below; required) |
Array[Object] |
litres or liters |
whether volume is expressed in litres |
Boolean |
kilograms or kilos |
whether weight of each item in ingredients is expressed in kilograms |
Boolean |
metric |
shortcut to apply both litres and kilograms options |
Boolean |
The following options define each ingredient in the ingredients batch option:
| option | description | type |
|---|---|---|
l or lovibond |
the value in degrees Lovibond of the ingredient (required) | Number |
w or weight |
the weight of the ingredient used (required) | Number |
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![dependabot[bot] avatar](https://avatars.githubusercontent.com/in/29110?v=4 "dependabot[bot]")
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