# Root touch-up and ash brown toning at Toni&Guy, a Seongsu hair salon - By Nari Chae (https://superchart.com/en/@seongsu-cotton-swab/) - Written Sep 18, 2026 - Local places › Hair & beauty salons › Seongdong, Seoul - Sponsored: This post was written after receiving the treatment free of charge from Toni&Guy Seongsu. - English edition: https://superchart.com/en/@seongsu-cotton-swab/seongsu-hair-salon-root-color-toning-ash-brown/ - Also in: [한국어](https://superchart.com/ko/@seongsu-cotton-swab/seongsu-hair-salon-root-color-toning-ash-brown/index.md) ## In short Toni&Guy Seongsu is a hair salon on Sangwon 1-gil in Seongsu-dong, Seoul, near Exit 7 of Ttukseom Station. Instead of a full dye, Toni&Guy Seongsu fixed roots that had grown out in three tones (black, brown and bleached) with a root touch-up and toning, then added a C-curl mid-length layered cut shaped to the writer's face. The grown-out roots were covered and the ash tone came back, for a result the writer calls 200% satisfying. ## Good to know - **Location**: 2nd & 3rd floor, 35 Sangwon 1-gil, Seongdong-gu, Seoul (straight along the main road from Ttukseom Station Exit 7) - **Services received**: Root touch-up + toning + mid-length C-curl layered cut - **Consultation**: Hair consulting with face ratio analysis (forehead : midface : lower face) - **Facilities**: Two-floor salon (2nd & 3rd), welcome drink, lie-down shampoo room *as written by the visitor on Sep 18, 2026* ## Why I wanted a mid-length layered cut in Seongsu I got a hair consultation from designer Sangyeon at Toni&Guy Seongsu and did root color plus a mid-length layered cut. Do you know that 'foreign-girl bob layered cut' that's trending lately? My roots were desperate for an autumn touch-up, so while looking for hairstyles, I noticed all the influencers whose style I've been loving lately have this mid-length layered cut! I wanted something like this (the look that's been taking over my Reels feed). Seongsu is so hot right now~ I figured a trendy cut like this needed to be done in Seongsu, so I got a hair consultation from designer Sangyeon at Toni&Guy Seongsu! Their hashtags were #SeongsuLayeredPerm #MattBrown #LayeredCut #AshBrown, so I thought I could nail both the root touch-up and the hairstyle I wanted at once~! ## Where is Toni&Guy Seongsu and how do you get there? ![Exterior of Toni&Guy Seongsu near Ttukseom Station](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-01-1ekcb-900.webp) Toni&Guy Seongsu is on the 2nd and 3rd floors of 35 Sangwon 1-gil, Seongdong-gu, Seoul. It wasn't hard to find at all! Come out of Ttukseom Station Exit 7 and walk straight along the main street. The moment I walked in, the interior blew me away. ## Inside Toni&Guy Seongsu: interior and facilities ![Interior of Toni&Guy Seongsu](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-02-1u22v-900.webp) ![View of the treatment area at Toni&Guy Seongsu](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-03-wojuc-m-900.webp) ![Interior design detail at Toni&Guy Seongsu](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-04-11j6v-900.webp) ![Spacious, pleasant interior of Toni&Guy Seongsu](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-05-1g7vd-900.webp) Whoa... it's so pretty I fell in love instantly. Seongsu is such a trendy area that I was already in a good mood just walking to the salon, but stepping inside, I couldn't help but gasp~! As soon as I sat down they brought me a welcome drink and the staff were so kind haha ![Welcome drink and seating at Toni&Guy Seongsu](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-06-x7epc-900.webp) ![Lie-down shampoo room at Toni&Guy Seongsu](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-07-1q3vp-900.webp) ![Shampoo room space at Toni&Guy Seongsu](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-08-1tfcc-m-900.webp) The shampoo area was spacious, and lying down for it was the most comfortable I've ever had it..!! The shop overall was big and pleasant. ## The hair consultation at Toni&Guy Seongsu: face shape first ![Getting a hair consultation at the styling seat](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-09-15t6k-900.webp) At Toni&Guy Seongsu, before the cut they did a face-shape analysis consultation first. I got guided right in, and hair consulting proceeded based on my face — and I found out something I hadn't known in 3-something decades..! I always thought I had a round face, but they told me my forehead : midface : lower face ratio was 1:1:1, which actually puts me in the long face category..? It was a bit bewildering to learn that for the first time, but since she said she'd cut accordingly, I trusted her and went along with it~ ## Before: dry hair and three-tone grown-out roots ![Before photo of dry, mid-length hair](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-10-1wsp6-m-900.webp) ![Before shot of the unkempt layered cut](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-11-3tl2u-m-900.webp) Here's my before photo! Hmm... how do I put it, it was in a pretty messy 'layered cut' state. You could barely even call it a layered cut^^. Looking at the roots from above, it's even more of a disaster. ![Overhead view of the three-tier root regrowth](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-12-rv65b-900.webp) Hahahaha ㅠ Not sure if you can tell, but there were three tiers to my roots: black on top, brown in the middle, bleached at the ends haha. ![Severely dry, tangled hair condition](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-13-9493s-900.webp) My hair had gotten so dry and damaged that it wouldn't even comb properly. Every time I untied it from a bun it would come out completely tangled like that. After a thorough consultation with my designer, instead of dyeing all of it, we decided to balance the overall color and clean up the tone with 'root color' and 'toning'! So the final solution the designer suggested was— - Make the root color as bright as possible - Even out the tone on the rest with toning (toning damages hair less than dyeing) - Do a layered cut That was it. I trusted her completely — let's go! ## How the root touch-up and toning were done ![Applying root color during the treatment](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-14-10lg2-1200.webp) ![Root color applied with no visible boundary line](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-15-41w19-900.webp) ![Hair mid-toning process](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-16-1mufa-900.webp) First came the root color, applied so naturally that there was zero visible boundary line with my existing hair color. Then I moved to the shampoo room for the toning process to eliminate all the reddish tint from my faded hair. The result of such meticulous application!! Isn't it amazing?? I was genuinely surprised that color alone could brighten hair that much~~ Watching her work felt like watching a true craftsperson... she kept layering the product on without letting it touch the already-processed roots too much, to avoid further damage — a skill she said not just anyone can do haha (I'd honestly never seen it before). Thanks to that, my scalp barely stung and the whole thing was really comfortable! ## After: an autumn-toned ash brown C-curl layered cut Absolutely amazing—!! Even just the toning alone made my hair look so much shinier, and it was surprising how it brought out that calm, luxurious mood that fits autumn perfectly. I couldn't get photos of the actual cutting process, but the style I wanted was that 'foreign-girl C-curl layered cut' that's been trending on Pinterest and Reels lately. The point was layers that weren't overdone or dated, keeping a natural volume, and a line that falls chic even when you just tousle-dry it carelessly. My designer read my head shape, face shape, and hair texture, and cut custom layers that suited me best. After the cut, she gave it a light C-curl style with a flat iron, and the person in the mirror was exactly the 'foreign-girl' vibe I wanted! ![Finished ash brown C-curl mid-length layered cut](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-17-1bxi0-900.webp) ![After shot showing the side-bangs line of the layered cut](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-18-1pbnx-900.webp) Thanks to the side-bangs line that flows softly along my cheekbones, it covers extra face space too, and my hair overall got so much lighter that it seemed like it'd be super easy to style day-to-day~!! It's a style that pairs perfectly with an autumn-essential trench coat or a cozy knit. ## Final verdict on Toni&Guy Seongsu: 200% satisfied ![Full shot of the ash brown hair right after the treatment](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-19-ey1bs-900.webp) ![Brightened roots with matched tone](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-20-1v9yz-m-900.webp) ![Side view of the styled C-curl mid-length hair](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-21-1jp32-900.webp) ![Shiny ash brown color after treatment](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-22-eozlo-900.webp) So excited after it was all done that I took photos from every angle at the restaurant afterward~ ![Photo of the hair taken at a restaurant afterward](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-23-gfe6u-m-900.webp) ![The layered cut on a trip back to Seongsu the next day](https://img.superchart.com/images/seongsu-hair-salon-root-color-toning-ash-brown/seongsu-hair-salon-root-color-toning-ash-brown-24-1h18d-m-900.webp) The next day I went back to Seongsu to help a friend get her makeup done, and I still loved my hair so much. The messy tiered roots were neatly covered, the toning brought back a luxurious ash tone, and on top of that I got a hip, sleek layered cut — a perfect three-part combo, good. If you're looking to transform into a moody, atmospheric look for autumn, I strongly recommend Toni&Guy Seongsu!! ## Where it is - Toni&Guy Seongsu (토니앤가이 성수점) - 35 Sangwon 1-gil, 2nd & 3rd floor, Seongdong-gu, Seoul, South Korea - 서울특별시 성동구 상원1길 35 2, 3층 토니앤가이 성수점 - 37.5466225, 127.0472677 - Google Maps: https://www.google.com/maps/search/%ED%86%A0%EB%8B%88%EC%95%A4%EA%B0%80%EC%9D%B4%20%EC%84%B1%EC%88%98%EC%A0%90/@37.5466225,127.0472677,17z --- Superchart · https://superchart.com/en/@seongsu-cotton-swab/seongsu-hair-salon-root-color-toning-ash-brown/ · https://superchart.com/llms.txt