Lips were RED in the 40's. If you can't go fire-engine red, then go down into the pink range, or orange. Avoid purple-shades of red and anything with a brown tint. Your lips are supposed to stand out and be very noticeable, so don't put on lipstick that's only one shade darker or redder than your lips.
 
Remember that full lips, with a pouting bottom lip and/or noticeable cupid's-bow top lip were standard in that era. So if you have a thin upper lip, used lip liner to draw a line just to the outside of the natural edge of your lip, thus making it fuller. For a pouting bottom lip, apply lip liner just below the natural edge of your bottom lip at the center.

"Porcelain" skin was in during the 40's, so go with a foundation no darker than your natural skin color, or a shade lighter.

The typical 1940's cheek was also natural and rosy use a pink-toned face powder, reds with pink undertones, vibrant pinks, brilliant rose tones over the cheeks and nose and forehead.

Hit your cheek bones and brush slightly up as you go back to give a delicate glow.

You may want to use a pearlized powder to look a little more glowing.

Eye shadow was gray or brown in the 40's, Brown eyes look good with anything, but blue and gray eyes look best with gray shadow. Green eyes-try both and see which goes best with your particular shade of green.

Do not apply any eye shadow below the outer corner of the eye.

Eyeliner can be used on the upper lid, but it is better not to use below the eyelid all together.

Don't extend it past the corner of the eye, top or bottom. Keep the line thin. Mascara may be used to darken light eyelashes, but it should not be heavy. No clumps and no fake eyelashes.