Two. Blue and yellow.
It depends if you're talking about green objects or green light:
There are 3 primary colors (red, blue and yellow) and 3 secondary colors (purple, orange and green).
There are 3 primary colors; Red, Yellow and green. Mixing combinations of these colors will give you all the colors.
There are 3 secondary colors, which are green, orange, and purple. Of course, these come in a great many variations. The primary colors are red, blue, and yellow. Secondary colors are made by a combination of two primary colors. Blue + yellow = green, red + yellow = orange, and red + blue = purple.
3 red, yellow, and green
There are 7 colors in a rainbow.There are myriad shades, but there are SEVEN defined colors : Red, Orange, Yellow, Green , Blue, Indigo, and Violet.
blue, green, orange, basically pastel colors
They can be 3 colors blue, green and pink
If you start with 2 colors you can make many hues of one color from them. For example, blue and yellow can only make different hues of green. But you can differentiate yellow-green anf blue-green from them.
They can be many colors. They can be red, orange,yellow,green,blue and many more colors.
There are four colors: Red, Green, White, and Black.
Four Colors - RED WHITE GREEN BLACK
green yellow and purple
The Brazilian flag has four colors: green, yellow, blue, and white.
White light is a mixture of many colors. If you see green when you look through a green glass, plastic, or whatever, it means that it lets the green light pass, other colors not.
There are 3 primary colors; Red, Yellow and green. Mixing combinations of these colors will give you all the colors.
There are 3 primary colors (red, blue and yellow) and 3 secondary colors (purple, orange and green).
most are usually green blue red yellow and white there have been cases were they were just 2 colors or even 3 but green cheeked parakeets all ways have at least 2 colors