Process Color – Refers to the CMYK color model used in offset printing to blend colors in such a way that it appears as a solid color to the human eye. https://www.webopedia.com/TERM/P/process_colors.html
Spot Color – a spot colour is an ink that is premixed to the colour required and printed from a dedicated plate, rather than being simulated by overprinting dots of ink from the cyan, magenta, yellow and black plates. https://graphicdesign.stackexchange.com/questions/9397/what-is-a-spot-pantone-colour
Hex Triplet – A hex triplet is a six-digit, three-byte hexadecimal number used in HTML, CSS, SVG, and other computing applications to represent colors. https://en.wikipedia.org/wiki/Web_colors