In solid form it is black, but it is usually a powder and that is brown.
rainbow
It is Black/Brown.
Green
It is Black/Brown.
some physical properties of Boron are: its color is black, it is a solid and it is rough shape
Green and is used with fireworks.
The flame color of boron in the flame test is bright green.
green color and its in laundry detergent
To give a green color to the flares
The flame color of boron in the flame test is bright green.
green color and its in laundry detergent
== == Some physical properties of boron are as follows: - rough in texture - black, white, or gray for the color - has a small shine or luster