If you're physically testing out foundations, start with a clean, moisturized face and zero makeup, and test on your jawline. "With African American skin tones, faces are lighter than your body, so don't use your hands or artificial lighting," says Mills. Start by testing three shades: one slightly lighter, one that looks like it matches your skin exactly and one slightly darker than your skin tone. Apply each one in a line from the cheek to the jawline and resist the urge the blend. Wait about five minutes (10-15 minutes is best, if you have the time). This gives the foundation time to warm up and mix with your facial oils to reveal its true color, says Mills. "The one that "disappears" is the one you should go with."

Once you've found your color family and general tone, Mills also offers a few tried and true tips:
• Black skin tends to skew oily, so try mineral bases along with a primer
• When in doubt, look for warmer bronze shades to avoid looking ashy.

Now that you're ready to shop, here are our top picks of lines that have the most range of undertones for dark skin tones.

Image via Imaxtree

The brand's Queen Collection was specifically designed with black women in mind, and contains new formulated products for black women and a wider shade range. CoverGirl Queen Collection All Day Flawless Foundation, $9.79, comes in 14 shades — that's 14 different variations between the light-medium shade and the darkest shade, which in many other cosmetic lines is only a mere two or three variances. Plus, this product has SPF 20 to counter hyperpigmentation and is a real multi-tasker, fusing foundation, concealer and powder into one.

IMAN Cosmetics breaks down foundation color into three categories:

Sand: light olive to tan
Clay: medium olive to light brown
Earth: medium brown to deep ebony

"Within these three categories, shades either range from light to deep or are in numerical order," says Giugliano.

The Iman Cream to Powder, $16, and Iman Stick Foundation, $16, both carry the most options, with 14 shades. Once you've used the categorization system to find your perfect match, Iman's website also has a nifty "Meet Your Match" section that suggests Sand, Clay and Earth tones if you wear similar shades in Black Opal, MAC, Revlon, Fashion Fair or Black Up.

Fashion Fair True Finish Refining Mineral Foundation, $28, comes in 18 shades between the lightest medium beige all the way to the darkest deep brown. What also makes this brand a standout: when you mouse over each shade on the brand's website, you're given a helpful summary of the present undertones (i.e. "Dark brown with a red undertone") to take more guesswork out of ordering online. Fashion Fair also takes blotchiness and hyperpigmentation into consideration with Fashion Fair True Fix Foundation , $29.30, which pairs 30 shades in 15 compacts with duos women can blend together to create an even skin tone.

M.A.C. is known for it's impressive color range and the brand doesn't disappoint in the foundation field. Many lines may offer 20+ shades, but this typically means there are 10 to 15 shades on the light to medium end of the spectrum and a few dark shades tacked on the end. M.A.C., on the other hand, has products like M.A.C. Studio Fix Fluid SPF 15, $27, which comes in a hefty 35 shades to hit every complexion -- from the lightest shade (3.5) to the deepest, which clocks in at 58.