expandShorthandProperty outputs incorrect results for border-color hsl followed by rgb

[nicksheen]

var cpp = require("css-property-parser")
cpp.expandShorthandProperty('border-color', 'hsl(214, 41%, 78%) rgb(218, 112, 214) white NavajoWhite')

outputs:
Object
border-bottom-color: "NavajoWhite"
border-left-color: "white"
border-right-color: "white"
border-top-color: "hsl(214, 41%, 78%)"

whereas it should output:
Object
border-bottom-color: "NavajoWhite"
border-left-color: "white"
border-right-color: "rgb(218, 112, 214)"
border-top-color: "hsl(214, 41%, 78%)"