Pop the hood, abd take a look at the Shock mount thingy area?!?, Where the strut braces attach, there should be a sticker that tells you what color it is. If there is no sticker then the car is either a respray or the sticker fell off...
Could be Imola Red from the E46 era. That is a loverly colour.
'97 E36 B3 3.2 Touring - Alpina-Blau
'15 F32 420d M Sport Coupe - BMW - melbourne-metallic (Sold)
'11 E92 320d M Sport Coupe - BMW-saphirschwarz-metallic (Sold)
'99 E36 328iA SE "Shooting Brake" - BMW-titansilber-metallic (Sold)
'89 E30 325i