Only with make-up
Skin that has color, regardless of ethnic/racial group, is naturally uneven from the start.
In a new baby, the uneven skin tones are symmetrical (the left half of the body matches the right half) with subtle transitions, so a baby's skin looks very nice. In the real world, spotty color changes occur due to sunlight, dryness, rashes, cuts, scrapes, pregnancy
, etc... Change can be darker or lighter.