What colour is this?

What colour is this?

1. white
2. yellow
3. red
4. grey
1. blue
2. yellow
3. green
4. grey
1. green
2. blue
3. white
4. pink
1. brown
2. yellow
3. orange
4. blue
1. brown
2. green
3. yellow
4. grey
1. green
2. yellow
3. orange
4. blue
1. pink
2. yellow
3. blue
4. violet
1. white
2. black
3. violet
4. green
1. blue
2. brown
3. black
4. green
1. blue
2. brown
3. red
4. yellow
1. white
2. black
3. blue
4. green