CIE 1931 xy color space diagram. Drawn (or rather programmatically generated) from scratch, but the visual design is based on File:CIExy1931.png by w:User:PAR. Major differences:
File:CIE1931xyY Blank-fr.svg
File:CIE1931xyY Blank-fr.svg: *File:CIE1931xy blank.svg : BenRG
derivative work Eric Bajart
derivative work: Eric Bajart