The term courscatian was coined by Tumblr user Medic-crow around May 13, 2018, inspired by opalian, spinelian, and iridian. Courscatian is based on the word coruscating, based on the root words of iridian (iridescent) and opalian (opalescent).
The flag was designed by the user Xeno-aligned on May 14, 2018, it was based off the iridian, opalian, and spinelian flags. The dark blue represents mlw, green represents mlm, white represents nblnb, yellow represents nblw and light blue represents nblm.
The second alternate flag was designed by Tumblr user rainbowscrying on January 20th, 2021. The dark blue represents mlw, blue represents mlm, turquoise represents mlnb, white represents nblnb, light purple represents nblw and dark purple represents nblm.