-- | Specifies an 'AlphaColour' by its RGB components and an alpha value.
--
-- @
-- 'rgba' r g b 0.0 = 'transparent'
-- @
rgba :: Word8 -> Word8 -> Word8 -> Alpha -> AlphaColour Double
rgba r g b = withOpacity $ rgb r g b
rgba :: Word8 -> Word8 -> Word8 -> Alpha -> AlphaColour Double
rgba r g b = withOpacity $ rgb r g b
rgba r g b = withOpacity $ rgb r g b