The red color gradually disappears when you go deep.
Red and orange are the first colors to noticeably fade away when you go deeper than 6 meters/20 feet.
Longer wavelenght colors are the first filtered by water (noticeably from 6m), while the blue color is more persistent, and might persist to -200m depth in clear tropical conditions.
Notice the color change on the diver red gloves as he ascend.
from a fun dive in cnf.
Location: the drop off.Moalboal, Cebu Island, Philippines.