While customizing the font color, which one of the following is not the available color coding scheme in LibreOffice Writer?

A. WXY

B. HSB

C. RGB

D. CMYK

A. WXY

WXY is Not a Color Scheme while HSB (Hue, Saturation and Brightness), RGB (Red Green Blue), and CMYK (Cyan, Magenta, Yellow, Key/Black)