Audi interior codes

[k6kid]

I have a complete grey leather interior taken from a 1990 coupe quattro which i am cleaning up to put in my coupe 16v. There are a couple of areas which may need some dye to bring them back to as new condition. However i am unsure of the audi name for the grey leather used in 1990. The door cards have the following code XU+NOK+5MF. I know NOK is leather but what do the other codes mean. i believe XU is the Audi colour name for the leather but cannot find it in any searches. Can anyone help?

[80Quattro]

I don't have the full software to hand at the moment, so don't take this as 100% correct.

XU - Platinum
N0K - Leather
5MF - Trim inserts

[Mikes2]

XU is graphite / platinum for the leather

[k6kid]

Thanks guys Platinum it is then. Have found a supplier near me (Gliptone) who mixes dye to a material sample so takes into account any fading over time.