@chriscodesthings/color-object
v1.0.0
Published
Simple, lightweight class to manipulate a color and convert between formats
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color-object ·
Simple, lightweight class to manipulate a color and convert between formats
Install
npm install --save @chriscodesthings/color-object
Description
The color object stores a color and provides methods for expressing the color in different formats and manipulating the color in different ways.
- Coercible - use as a string to return a CSS hex color code.
- JSON Compatible - use JSON.stringify to export color as a CSS hex color code.
Sections
Constructor · Sections
Syntax
import Color from '@chriscodesthings/color-object';
new Color(color);
Parameters
- color (optional):
If omitted, a random color is generated.
If true
, a random dark color is generated, if false
, a random light color.
A specific color can be specified as a CSS hex color code or as an array.
Note, if an invalid color is specified, the color defaults to black.
Examples · Sections
Random Colors
If the first parameter is omitted or boolean true/false
then a random color is generated.
new Color(); // Random color
new Color(true); // Random dark color
new Color(false); // Random dark color
CSS Hex Color Code
A CSS hex color code can be passed, in short or long form, with or without an alpha value.
new Color("#639"); // rebeccapurple
new Color("#6495ed"); // cornflowerblue
new Color("#6495ed7f"); // cornflowerblue with 50% transparency
RGB or RGBA Values
An RGB or RGBA color can be passed in an array in the form [red, green, blue, alpha (optional)]
, with or without the alpha value.
new Color([100, 149, 237]); // cornflowerblue
new Color([100, 149, 237, 0.5]); // cornflowerblue with 50% transparency
Methods · Sections
- constructor() - create the
Color
object - set() - set the color
- asHex() - output as CSS hex color code
- asRGBA() - output as RGBA array
- fade() - fade the color
set(color) · Methods
Description
Sets the color.
Use
const col = new Color();
console.log(col.set([100, 149, 237])); // cornflowerblue
// => true
Parameters
- color: the color to set
The color can be provided using the same rules as Constructor.
Returns
Returns boolean true
on success, false
if the color provided isn't valid.
Note, if
false
is returned, the color is unmodified.
asHex() · Methods
Description
Outputs color as a CSS hex color code.
Use
const col = new Color([100, 149, 237]); // cornflowerblue
console.log(col.asHex());
// => #6495ed
Returns
Returns a string containing CSS hex color code.
asRGBA() · Methods
Description
Outputs color as red, green, blue and alpha values.
Use
const col = new Color([100, 149, 237]); // cornflowerblue
console.log(col.asRGBA());
// => [ 100, 149, 237, 1 ]
Returns
Returns array containing [red, green, blue, alpha]
values.
Note, the alpha value is always provided. If the color has no transparency set the alpha value will return 1.
fade(by) · Methods
Description
Fades a color towards black or white by a given percentage.
Use
const col = new Color([100, 149, 237]); // cornflowerblue
console.log(col.fade(-50)); // fade 50% towards black
// => #324b77
Parameters
- by: a percentage from -100 to 100. Negative values fade towards black, positive towards white.
Returns
Returns a string containing the CSS hex color code of the faded color.