Constant siege_color::srgb::SRGB_CHROMATICITIES

pub const SRGB_CHROMATICITIES: Chromaticity = Chromaticity{red: Vec2{x: 0.64000, y: 0.33000,},
             green: Vec2{x: 0.30000, y: 0.60000,},
             blue: Vec2{x: 0.15000, y: 0.06000,},
             white: Vec2{x: 0.31270, y: 0.32900,},}