18pdr restoration project - colours?

[Derek]

I am in the process of restoring an 18 pdr HE projectile, can anyone give me the correct RAL colour for the mustard yellow finish and also the colours used on the stencils as I want to make it as authentic as possible.
Thanks!
Derek:tinysmile_hmm_t:

 

[MMP1917]

I use the following paint: LEVIS N1638
RGB Hexdecimal: #A6753A
RGB 0-255: 166, 117, 58
RGB %: 65.1, 45.9, 22.7
CMYK %: 0, 30, 65, 35
Grayscale: 125 (RGB values)
L: 53, a: 15, b: 40
Hue: 33, Saturation: 65%, Lightness: 65%
X: 0, Y: 65, Z: 65