index.js
function create(r, g, b, a) {
  return [r || 0, g || 0, b || 0, (a === undefined) ? 1 : a];
}
function create(r, g, b, a) {
  return [r || 0, g || 0, b || 0, (a === undefined) ? 1 : a];
}
function create ( r , g , b , a ) { return [ r || 0 , g || 0 , b || 0 , ( a === undefined ) ? 1 : a ] ; }
RGBA color constructor function
@param  {Number} [r=0] - red component (0..1)
@param  {Number} [g=0] - green component (0..1)
@param  {Number} [b=0] - blue component (0..1)
@param  {Number} [a=1] - alpha component (0..1)
@return {Array}  - RGBA color array [r,g,b,a] (0..1)
RGBA color constructor function