var app = Application.currentApplication()
app.includeStandardAdditions = true
app.activate()

ObjC.import('stdio')
ObjC.import('stdlib')

try {
  var res = app.chooseColor({defaultColor: {{json .}}})
} catch (e) {
  if (e.errorNumber === -128) $.exit(1)
  $.dprintf(2, e)
  $.exit(-1)
}

{'rgb(' + res.map(x => Math.round(x * 255)) + ')'}