Lemon & Lavender
Sometimes for compositional interest I will pair items of complementary colors, as in this painting the yellow of the lemon with the purple of the lavender. By placing complementary colors together a visual vibration occurs heightening interest and actually enhancing the perception of each color.
A lot of things in everyday life are made up of complementary colros such as, red and green in Christmas decorations, and blue and orange stripes found on rugby shirts.
If you look around, I am sure you to will notice complementary color combinations in all areas of your life...