An adjective that relates to light and dark contrast is...
vivid
vigilant
chiaroscuro
stalwart
Sticky or clingy - both physically and emotionally
guttural
stridulant
viscid
gleaming
Tall, slender and graceful in motion.
lissom
assertive
willowy
indomitable
Whispering or rustling softly (e.g. leaves, water, wind)
magnetic
misty
enigmatic
susurrant
A remark / comment / humour that is sharply sarcastic is...
cerebral
vivacious
jubilant
mordant
This adjective is great to describe shadowy and obscure surroundings a moody scene.
oneiric
floaty
tenebrous
dazzling
A brooding, dark expression is...
saturnine
lush
robust
verdant
Able to change form easily; adaptable and elusive.
Abysmal
Protean
Convalescent
Intricate
Smoothly charming.
unflappable
amorphous
suave
mercurial
Something that is cold and dark, tomb-like evoking dread or solemnity is...
choral
chrystalline
alkaline
sepulchral
Transparently clear, either literally or metaphorically
Effervescent
Murmurous
Pellucid
Oblique
Something (usually, face expression) that is dreary, mournful, bleak and gloomy is also called...
anticlimactic
tremendous
transfixing
lugubrious
Subtly charming in an innocent way.
elusive
winsome
seraphic
tenacious
Detached, drifting, without anchor - physically or emotionally
liminal
unmoored
clandestine
diaphanous