This is the 5202nd most frequent Catalan word.
bayon
The word "bayon" does not exist in Catalan. It may be a misspelling or not a recognized term.
Here, 'bajón' refers to a dull or muted shade of color, a colloquial use for pale or lacking vibrancy.
El noi portava una camisa amb ratlles de color bajón.
The boy wore a shirt with stripes of a dull color.
'Bajón' is used metaphorically to describe a drop or decrease, in this case, in energy levels.
Aquest matí he tingut un bajón d'energia després de córrer.
This morning, I had an energy slump after running.
In this sentence, 'bajón' represents an emotional drop or feeling of sadness.