The bird with blue wing feathers in Greece is called a Blue Winged Teal. It has cinnamon brown body feathers and patterned black marks on it.
My mother always called ecchymoses "black and blue marks."
This criteria is a black wisdom
Most of the body is blue and a yellow black fin.
royal blue body,yellow tail and black "palette" design
Yes, the peak of their black body spectrum is in the UV band but to our eyes the color looks blue or blue white depending on how far into the UV band the black body peak is.
moles are a black dot on your face or other parts on your body. their purpose are to be beauty marks
The blue ringed octopus has yellowish skin with blue and black rings all over its body
a Common Grackle is one
The black and blue hairy flower wasp (Scolia soror) and the great black wasp (Sphex pensylvanicus) are bugs that have black bodies and black-blue wings. The steel-blue aphid- and cricket-hunting wasp (Chlorion gerarium) gives black-and-blue impressions that cautiously closer inspection proves to be more black of wings and blue of body. The three insects will be found respectively in Australia (case 1) and North America (examples 2, 3).
cobra
The subfamily Therclinae in the Lycaenidae family has butterflies that tend to have black body with blue dots on the wings. The type of butterfly is close to a hairstreak.