black phelgm is usal for those who smoke.
Phelgm discharge
Phlegm.
you should color Arthur a little brownish grayish or just brown.
Phlegm refers to the mucus lining of bodily cavities, especially that of the respiratory system. Excessive phlegm is associated with colds and influenza and can cause coughing and respiratory distress.
There is no color you "should" dye your hair...it's whatever color you want to dye it!
the color of your heart.
rainbow colors
any color
blue or black
In Canada or the UK it is colour in the USA it is color
white.