Inspiration for details and shapes that could communicate an idea in artworks:

Contrast between a dark/black background and a mostly light toned character with a pop of red/any other vibrant color makes for a striking artwork.

Author unknown

Once again the black backround fits perfectly. The second figure seamlessly turns into a darker green at the bottom.
Nice poses!!

Ballet

I love the way the girl looks like an angel with wings. Could use this type of posing to imitate other beings in art as well (ex: the way she bends her arms to make them look like wings)

Flashlight effect! Really nice colors and a good composition. Small details on the skin make it look very tight. Cool hair shape as well!!