How to define color of country by a vector?

Basically, I have a vector with 31 value, and each value represent a country in europe. These value are between 1 and -1.

A colormap is made, which tells you, if the value is between 0.2 and 1 then color corresponding color to these values are red and if -0.2 to -1 the related color to these values are blue and the color for between values are green.

Now how can i use this colormap to make plot of europe map. where fx if germany has 0.3 as value then color of this country shall be red or if spain has -0.8 as value then spain color need be blue?

[darova]

What have you tried already?

What about this simple solution?

if 0.2<v(i) && v(i)<1
    color = 'red';
end

[Ali Nouri]

I have tried facecolor and geshow.