If it's for powdercoat then find out what brand of powder is being used and then order a sample of swatches. You'll be guaranteed to get a significantly better match than RAL 9010 which is a 'pure white', and IMHO, more suited to household appliances, such as washing machines, than obsolete Italian scooters.
For example, my powdercoater uses Prismatic Powder, among others.
Prismatic sell more than 100 shades of white powder. They will also mail you free swatch samples. Alternatively, your powdercoater will most likely have a swatch fans or booklets. Spend 10 looking minutes finding a close match. Just my 2 cents, but if you're going to the effort of having it powdercoated, why not spend a few extra minutes and do it right.
...unless the washing machine color palette is what you're going for
