The 1940s was an interesting era for make-up as it starkly contrasts the ideals and standards for make-up today. During the 1940s the purpose of make-up was to enhance the wearer's natural beauty, not create a completely new look. If you desire a more natural look, mimicking the style of 1940s make-up would be ideal.
Apply a foundation slightly darker than your natural skin tone all over your face. Blend the foundation up into your hairline.
Apply a facial powder slightly lighter than the natural skin tone all over your face.
Sweep a red rouge with pink undertones or a bright pink rouge with fuchsia undertones across the cheekbones. The undertone colour of make-up is the low or subdued tone beneath the main colour.
Apply a muted grey or brown eyeshadow to the upper eyelid.
Apply a dark brown or black lengthening mascara to the upper eyelashes.
Apply a bright red lipstick to your lips.
The idea behind 1940s make-up is that "less is more."