Apt rhyme for blue (3)
I believe the answer is:
hue
(Other definitions for hue that I've seen before include "Tint, shade" , "Colour or tint" , "'Pigment, colour (3)'" , "red or black, say" , "Tinge" .)
I believe the answer is:
hue
(Other definitions for hue that I've seen before include "Tint, shade" , "Colour or tint" , "'Pigment, colour (3)'" , "red or black, say" , "Tinge" .)