better scala enum with play reads/writes

betterenum.scala

import play.api.libs.json._

sealed trait Color
object Color {
  type Red = Red.type
  type Green = Green.type
  type Blue = Blue.type

  case object Red extends Color
  case object Green extends Color
  case object Blue extends Color

  implicit val colorReads: Reads[Color] = new Reads[Color] {
    override def reads(json: JsValue): JsResult[Color] = json match {
      case JsString("Red") => JsSuccess(Red)
      case JsString("Green") => JsSuccess(Green)
      case JsString("Blue") => JsSuccess(Blue)
      case _ => JsError("Bad Color")
    }
  }

  implicit val colorWrites: Writes[Color] = new Writes[Color] {
    override def writes(o: Color): JsValue = o match {
      case Red => JsString("Red")
      case Green => JsString("Green")
      case Blue => JsString("Blue")
    }
  }
}

case class Meh(id: Int, color: Color)

implicit val MehReads = Json.reads[Meh]

val obj = Json.obj(
  "id" -> 1,
  "color" -> "Green"
)

val meh: JsResult[Meh] = Json.fromJson[Meh](obj)