darkness, murkiness

SHADE
WordClue
DUSKdarkness, obscurity
GLOOMDarkness, dimness or obscurity
HEART... of Darkness (Conrad)
KHAKIcolor shade of yellowish-brown
INDIGOdeep and bright shade of blue
SCREENcurtain, shade
CURTAINshade, arras
DIMNESSdarkness, gloom
DARKNESSmurkiness, dimness
MURKINESSdarkness, dimness
NIGHTFALLdarkness, dusk
OBSCURITYDarkness
PESSIMISMgloom
OBSCURITYdarkness, murk
GLOOMdarkness, nightfall