(あさや)

あさやけ
noun
morning glow; sunrise colors
1. morning glow; sunrise colors
The red, orange, or pink colors in the sky during sunrise.
I drank coffee while watching the beautiful sunrise colors.
The sky was dyed orange with the morning glow.
They say a morning glow is a sign of worsening weather.

朝焼(あさや)け refers to the colorful sky at sunrise.

WORD FORMATION:
(あさ) (morning) + () (burning, glow) = 朝焼(あさや)

COMMON COLLOCATIONS:

WEATHER PROVERB:
朝焼(あさや)(あめ) - A red sky at morning means rain
(Similar to the English "Red sky at morning, sailor's warning")

朝焼(あさや)け VS 夕焼(ゆうや):
朝焼(あさや)け is morning glow (sunrise), while 夕焼(ゆうや) is evening glow (sunset). The opposite weather prediction applies: 夕焼(ゆうや)() (evening glow means fair weather).