Too Dark Shadows,Shadows are too dark

shadows are too dark and the cube is not even white how do i fix it ?

_

,
shadows are too dark and the cube is not even white how do i fix it ?

There are two different issues here:


The cube is not white when fully lit

Increase the Intensity property of your directional light


The shadows are too dark

Multiple things you can do:
1.) Change the Ambient Color property in Window > Rendering > Lighting Settings.
2.) Use an additional direct light: Add a second Directional Light and change its rotation and intensity so that it looks good.
3.) Use indirect lighting (realistic but also complex solution): Enable Baked Global Illumination in Window > Rendering > Lighting Settings, mark cubes as static, then bake Light Map