Question: Setting a sprite's color to an RGBA array instead of a named value

[benjamingorman]

I want to be able to do something like this:
new jaws.Sprite({color: [150, 150, 150, 255]})

Instead of:
new jaws.Sprite({color: "red"})

So that I am able to make alterations to this colour upon game events, e.g. collision with another object.

The only information the docs gives is this:
http://jawsjs.com/docs/symbols/jaws.Sprite.html#color
in Field Detail:
{string|gradient} color
If set, draws a rectangle of dimensions rect() with specified color or gradient (linear or radial)

Which isn't very helpful because it doesn't describe the syntax to use to specify a color or gradient.
I'm struggling to work out from the jaws source code how an RGBA colour could be described. How might I address this problem?