'Darkness' in the Bible

Now this is the message we have heard from Him and declare to you: God is light, and there is absolutely no darkness in Him.

If we say, “We have fellowship with Him,” yet we walk in darkness, we are lying and are not practicing the truth.

Yet I am writing you a new command, which is true in Him and in you, because the darkness is passing away and the true light is already shining.

The one who says he is in the light but hates his brother is in the darkness until now.

But the one who hates his brother is in the darkness, walks in the darkness, and doesn’t know where he’s going, because the darkness has blinded his eyes.