tank colors

Help I need tank colors for a 1976 360 gp purple and for a 1981 430 xc light blue thanks for the help

360= liquid paint of car french CITROEN =
DELAGE EKA years 1980/2000


430 XC = RAL 5005

I need the more purple color for the 360

I took my 76cr 360 tank to the auto parts store and they matched it.They used that rig that tells what the color combo is.It got it close so then they started to play with the color combo A little more of this a little less of this an so on until it matched the tank perfect.The problem is there was no accurate measurements of the different colors.The paint guy said prime a flat piece of metal then paint it and put on the clear he said in the future bring in the painted piece and he would match it he said the machine had trouble with the curve of the tank that's why he told me to paint a flat piece.The tank in the pics is for my 77 360wr which is the same colorI hope that helps.
Tom