a question on changing the version phpbb2 to phpbb3

hi, i want to change my forum from phpbb2 to phpbb3, i just want to no if i change it , will it change the colour and theme of my forum. thanks,

The colors and your images won't change change if you have NOT defined a custom CSS and you choose "current style" when you change the version. If you have custom text in your CSS, then this option won't be available and you can only use the versions default style.

in either way, there will be a preview window where you can see how it will look after the change when you click on a version without saving.