The sky will have strange colors if set sunset while being spectator mode, on under terrain.

Steps to reproduce the issue:

1. Change the mode to Spectator Mode.

2. Move down approximately 10–20 blocks.

3. Open the chat and change the sky to sunset ambient.

Expected result:

The sky color changes to orange, as expected for a sunset.

Actual result:

The sky color changes to a strange yellow/orange, not the correct sunset color.