Assalammualaikum ya ukhti @ikrahch
I want to connect silaturrahmi with you.
My opinion, the color is good for the day of the week is (white color) color symbolizes the color of the sacred and pure, there is no mixture of any or the basic color of the sun.
white color is a neutral color, pure sagat, so this color is always suitable juxtaposed with any color.
holy effect, pure and clean is the price die.
if we look in the history of the struggle, this color is very suitable for the Islamic ummah who is pure dew, sincerity in it.
that's just my opinion as a connector of silaturrahmi.
Wa alaikumsalam ya ukhti @ikrahch