SOURCES
BrickLink Color Guide, https://www.bricklink.com/catalogColors.asp
Rylie Howerter Color List, https://ryliehowerter.net/colors.php
Meca Bricks Colour Chart; https://www.mecabricks.com/docs/colour_chart.pdf
LEGO.com, Lego Group History; https://www.lego.com/en-us/aboutus/lego-group/the-lego-group-history