Since we're on fabrics, and fabric design, let's talk about straight lines.
Straight lines are parallel to the top edge of a piece of fabric, or, they are parallel to the side edge of a piece of fabric. You can imagine that: parallel lines that are vertical or parallel lines that are horizontal on a piece of fabric, and in varying colors. You can have navy on white, or white on navy, for instance, or any number of other color combinations ad infinitum, and of any size of stripes: any sizes or colors that come to your imagination. It's an easy experiment, to try different colors and sizes along these lines, on your sketch paper. (You can use a ruler: I do.)
Now consider a piece of fabric that has straight lines going vertically and also straight lines that form the horizontal pattern. Together they mesh, along the expanse of the 2-dimensional fabric, criss-crossing endlessly, "up-and-down" along with "left-to-right". This has often been called "plaid", and, though it is not limited to this, men's shirts from time immemorial have been made from plaid flannel. These particular plaids come in "manly" colors such as shades of brown and tan and black and cream, blues and greens and yellows, and especially shades of red, with some brown and white. All with lines that are straight as an arrow, going in "two dimensions"!