Made a mistake with colours.

Hi,

Recently painted a room with 4 walls, and we painted them 2 green and 2 white.

But we don't like how it's turned out with the white, it ruins the look of the now lovely glossy wood.

But we love the green, and so far we've just done 1 coat all around, so are wanting to change it too green all around.

if we paint the white walls with the green, as it's got fresh white paint underneath will this end up with a slightly different shade to the already green walls?