The personal flag of
Princess
Sirinthon consists of a purple background
with her initials, i.e. a
ส in blue and a ธ
in yellow, underneath a golden crown.
Whereas the crown, which is smaller than
those of the king or queen, refers to her royal status as a princess, the yellow
and blue of her initials are the colours of the days on which the
king
and
queen
were born.