In the back of the '29 to '49 parts manual I have, the paint combination chart shows:
Comb. no. 221 export blue, argent silver stripes, black wheels
Comb. no. 223 regency blue, argent silver stripes, regency blue wheels
Comb. no. 235 regency blue, silver stripes, regency blue wheels
Comb. no. 239 Interlake blue, white stripes, Interlaken blue wheels
Comb. no. 241 Pennant blue, white stripes, Pennant blue wheels
These are all 1938 combinations, does say truck or car. Look on the body plate to see if any of the 5 numbers are on it. These of course are US colors, export maybe different.