You can use this principle with any combination of colors - try choosing jewel tones or deeply saturated hues (like this berry & merlot) for a luxe, sophisticated look.
Remember the old saying, "match your bag to your shoes"? Nothing could date you faster than adhering to this rule - so add pops of color to an otherwise neutral outfit with differing bold shades (my favorite combination = mustard + pine).
These were everywhere for spring & summer and there is no end in sight. Think about purchasing richer hues for this season in a thicker twill or slim-fitting corduroy.