XYZColor

XYZColor[x,y,z] represents a color in the XYZ color space with tristimulus values x, y and z.

XYZColor[x,y,z,a] specifies opacity a. 

XYZColor["string"] returns a color from an HTML color name etc.

XYZColor[color] returns the XYZ representation of color.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.