At the place where I work we needed some touch up paint for the conveyors and just took a paint chip to O'Reilly Auto parts to have it matched. Most hardward stores (around here) have/had computer scanning that can match what color you want. O'Reilly auto parts did do a very good job and put it in a spray can,,,,,,,,, but was $21.00 a can
But looked good and did the job very well.
See Ya
Brent
PS.... Oh yes, the match we had, on the converyors, did also come back to 1999 White Volvo!