Freckles are brownish and warm-colored, so you want something that is going to complement them rather than contrast with them. Go for a slightly peachy colored blush or a neutral bronzer or blush, which will bring out the freckles giving a sun-kissed look to your face. Avoid blush or bronzer with glitter or similar properties as these can contrast with the freckles, making the face look too busy.
People who have freckles also have fair skin so it's essential that you wear sunscreen if you want to protect your skin from sun damage. The other benefit of using sunscreen is that it will stop your freckles from becoming darker and keep new ones from popping up. Look for a high SPF sunscreen of 30 or above.
When it comes to the lipsm freckled faces should opt for colors such as brown and plum, as these will complement the skin tone in addition to the hair color as well. Avoid colors such as pink, even if it is the color of the season, as this will contrast with the color of the freckles. Sporting nude lips also works well if you want to go for the less-is-more look.