By Sarah Fendrich · August 2, 2026
Hi-Def Foundation is my #1 bestseller, and the question I get more than any other is the same one every time: which of the 14 shades is actually mine? It's a fair question — foundation is the hardest thing to buy online, because you can't swatch it in person before you commit.
Here's the good news: you don't have to guess. Below are the same three tests I use in private lessons to find someone's undertone in under a minute, plus something most brands don't offer at all — a free, personal shade match from me, using nothing more than a photo, a FaceTime call, or a tag on social media.
Two families, not three
Hi-Def Foundation is built on two shade families spanning seven depths each, fair to deep:
- N — Cool Neutral — for pink, rosy, or blue-toned undertones
- C — Warm Yellow — for golden, peachy, or olive-toned undertones
Everyone falls into one of these two families. The tests below tell you which.
Find your undertone — 3 quick tests
Do these in natural daylight. Most answers in one column is your undertone.
| Cool | Warm | Neutral | |
|---|---|---|---|
| Vein test (most reliable) |
Blue / purple | Green | Blue-green |
| Jewelry | Silver looks best | Gold looks best | Both |
| Sun | Burn easily | Tan easily | A bit of both |
Cool → the N family (Cool Neutral). Warm → the C family (Warm Yellow). Neutral or hard to tell? You're genuinely in-between — skip to the personal match below and I'll pick for you.
Pick your shade
Swipe sideways, then tap a shade to shop it. Screen colors vary, so ask me to confirm your match.
Get matched by Sarah — personally
Here's what 20+ years at Bobbi Brown and Christian Dior actually taught me: I can look at almost anyone — in person, on a video call, or in a well-lit photo — and tell you your exact shade, usually on the first try. It's not a party trick. It's thousands of hours of matching real faces to real formulas, and it's the reason my clients never end up with a foundation that doesn't fit.
You don't have to guess alone, and you don't have to return a $50 bottle that's the wrong shade. I offer this personally, at no cost, before you buy:
- Send a photo — text or DM a clear, makeup-free selfie in natural daylight. I'll reply with your exact shade, usually the same day.
- Hop on a quick FaceTime — a 2-minute video call is often all it takes.
- Tag me on social — post or story a bare-faced selfie and tag @sarahfendrich, or comment "shade match." I check tags daily.
This is a real, personal match — not an automated quiz. Most people hear back the same day.
→ Shop Hi-Def Foundation — all 14 shades
Want the full guide?
I put together everything above — plus all 14 shade profiles with color swatches, the buildability rule, a visual decision tree, step-by-step pro application technique, troubleshooting, and a printable quick-reference card — into one free PDF guide.
What to do after Hi-Def Foundation
Set it with Hi-Def Powder Loose — tap, never rub, to lock in coverage. For all-day hold, start with Camera Ready Primer underneath and finish with Setting Spray on top.
Want to learn this on your own face, with your own products? A private makeup lesson — in person in Danville or online via Zoom — walks you through foundation application personalized to your skin tone, face shape, and lighting at home.
→ Book a Makeup Lesson with Sarah
Have a question about your shade? Text or DM Sarah directly — see the matching options above.
Shop the products in this post
Sarah's picks for a full-coverage, all-day base — everything you need to go with your Hi-Def Foundation.
Sarah’s starter recommendation
Camera Ready Primer + Hi-Def Foundation + Hi-Def Powder Loose — the full base routine ($138)
