Marl colours hide the most
Short answer: Marl fabric is knitted from yarn in several shades. That makes stains, lint and sweat marks disappear into the pattern.
How marl is made
Marl yarn is made of fibres in two or more colours spun together. The result is a surface that is never entirely uniform. The eye therefore has no even field against which to measure a mark.
What it hides
Damp sweat marks, pale lint and small stains are far less visible on marl fabric than on a plain one. That is why grey marl is so widespread in sweat clothing and t-shirts. See bamboo t-shirts for men.
Where it does not help
Marl hides neither large stains nor bobbles, which stand out from the surface whatever the colour. It hides contrast, not structure. See sweat clothing and bamboo t-shirts for women.
Frequently asked questions
Is marl fabric lower quality
No. It is a yarn technique and says nothing about fibre or knit.
Does marl fabric fade differently
It fades more evenly, because several shades change at the same time.
What is best on hot days
Marl in a mid dark tone. It hides both sweat and dirt.