Color = uint32

Viridis {...}{.pure.} = enum
  transp = 0, blue = 527938815, green = 748694783, gray = 3217014783, red = 3592890623,
  orange = 4286516991

Transparent = 0'u

Black = 255'u

Blue = 65535'u

Green = 16711935'u

Red = 4278190335'u

Purple = 4278255615'u

Yellow = 4294902015'u

White = 4294967295'u

HalfTBlack = 136'u

HalfTBlue = 65416'u

HalfTGreen = 16711816'u

HalfTRed = 4278190216'u

HalftWhite = 4294967176'u

proc color(r, g, b, a: int = 0): Color {...}{.raises: [], tags: [].}

proc withAlpha(c: Color; a: int = 0): Color {...}{.raises: [], tags: [].}

proc blend(orig: var Color; newc: Color) {...}{.raises: [], tags: [].}

proc blend(orig: Color; newc: Color): Color {...}{.raises: [], tags: [].}

proc `$`(c: Color): string {...}{.raises: [], tags: [].}

converter toColor(v: Viridis): Color {...}{.inline, raises: [], tags: [].}