YouTube Channel Banner Safe Areas

Write a YouTube channel banner prompt that respects safe areas. The interesting part must sit in the center, because televisions, phones, and desktops crop differently. CHANNEL Subject: [WHAT THE CHANNEL IS] Palette: [COLORS] Imagery: [A WIDE SCENE OR AN ABSTRACT FIELD] Text: none in the image. I will add the name inside the central safe area in layout. PROMPT Aspect 16:9 for the full bleed, but describe a calm center third and busier edges that can be cropped away. No faces at the extreme left or right. No fine detail that only exists at the edges. No logos of the platform. Also list, in words, the safe area I should keep clear (the middle), and a phone-crop check: what remains if only the center survives. Negative: tiny text, UI screenshots of YouTube, watermarks.