Give a specific color to an interval of value

Hi, i have to plot with pcolor a matrix with values from -1 to 1. How can i assign to the values from -1 to 0.3 a color in grey scale and to the values from 0.3 to 1 a color in green scale? Thank you all

[Walter Roberson]

Are you talking about exactly two colors? Or are you talking about shades of colors -- that -1 to 0.3 is shades of grey and 0.3 to 1 is shades of green?

[Giacomo Abrardo]

I'm talking about shade of colors

Answer 1

[Walter Roberson]

I suggest you use https://www.mathworks.com/matlabcentral/fileexchange/69470-custom-colormap