Green lighten to 1 is green

[petrohi]

(new Colour('red')).lighten(1).rgb()
Object {r: 255, g: 255, b: 255}
(new Colour('blue')).lighten(1).rgb()
Object {r: 255, g: 255, b: 255}
(new Colour('green')).lighten(1).rgb()
Object {r: 0, g: 255, b: 0}

[rickyvetter]

This is not actually a bug.

It looks strange because of HTML color spec and because lighten is a relative process.

First, HTML "red" and "blue" are both pure colors to start with (255 for one value and 0 for the others). HTML "green" is strangely only half brightness (128 for green, 0 for the others). If you were to use "lime" instead, you would get the values you want!

For more info on the lighten function being a relative process, see #53. Passing one basically doubles the brightness of the current value. Since "green" is half-bright, it takes that value up to 255 ("lime"). If you were to run (new Colour('green')).lighten(1).lighten(1).rgb() - you would also get the results you were expecting.

[MoOx]

Interesting. Thanks for this explanation !