posted by rfvv .
1. A rainbow is an arch of seven different colors, red, orange, yellow, green, blue, indigo and violet.
(is this grammatically correct?)
2. What is the color of the tulip?
3. What's the tulip's color?
4. It's pink.
5. It's the color pink.
6. It's the pink color.
(What about the questions and answers? Are they all correct?)
They're all correct. However, # 6 is rarely used.