Tru-SpecMen's 24-7 Series Original Tactical Short

can I dye these a darker brown with Rit Dyemore?

why is there a disclaimer stating they may cause cancer

How larger at the front pockets? I like deep front pockets like big enough for a can of spray paint.

Why is the color Coyote $10.00 more than the color Khaki for the same size/shorts? ($38.00 vs. $29.00)