Color() Troubles

I can’t seem to grasp how Color works in C#. I’m trying to darken a sprite when night falls, using SpriteManager. SpriteManager is changing the colors (I can get a black sprite, or a blue sprite, red sprite, green sprite, etc).

For debug purposes I am using a gray scale sprite, and I’m attempting to color it light blue or dark navy blue depending on time… It doesn’t seem to work though.

if (_night & _transition)
            {
                Color _color = new Vector4(17f, 55f, 74f, 255f).normalized;
                Main.level.skySprite.SetColor(_color);
                _transition = false;
            }

if (_day & _transition)
            {
                Color _color = new Vector4(205f, 227f, 238f, 255f).normalized;
                Main.level.skySprite.SetColor(_color);
                _transition = false;
            }

Colour uses float 0-1 not int 0-255. Color32 uses the int version, you want to divide everything by 255f.