Answer:

ROYGBIV or Roy G. Biv is an acronym for the sequence of hues commonly described as making up a rainbow: red, orange, yellow, green, blue, indigo and violet. The initialism is sometimes referred to in reverse order, as VIBGYOR. 

Explanation:

RED

ORANGE

YELLOW

GREEN

BLUE

INDIGO

VIOLET

Answer:

R-RED

O-ORANGE

Y-YELLOW

G-GREEN

B-BLUE

I-INDIGO

V-VIOLET