Long name		Name	Color		RGB
Atlantic trough		AT	indigo		(75,   0,130)
Zonal	 		ZO	red		(255,  0,  0)
Scandinavian trough	ScTr	darkorange	(255,140,  0)
Atlantic ridge		AR	gold		(255,215,  0)
European blocking	EuBL	yellowgreen	(154,205, 50)
Scandinavian blocking	ScBL	darkgreen	(  0,100,  0)
Greenland blocking	GL	blue		(  0,  0,255)
No regime 		no	grey		(128,128,128) 
