# #21231f

A color — neutral, dark, luxury, bold. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#21231f`
- RGB: rgb(33, 35, 31)
- HSL: hsl(90, 6%, 13%)
- OKLCH: oklch(0.253 0.008 128.8)
- Relative luminance: 0.0162
- Nearest named color: Underworld (#1e231c, Δ 0.817) — https://brandsweets.com/colors/underworld
- Moods: neutral, dark, luxury, bold
- Page: https://brandsweets.com/colors/21231f

## Tints & shades

- Tints (toward white): #383b35, #4d5148, #63695d, #787f71, #8f9688, #a3a99e, #babeb6, #cfd1cc, #e6e7e4, #fafafa
- Shades (toward black): #1f201d, #1c1e1a, #1a1b18, #171816, #171816, #141613, #121311, #0f100e, #0d0e0c, #0a0b0a

## Harmonies

- Complementary: #211f23
- Analogous: #23231f, #1f231f
- Triadic: #1f2123, #231f21
- Split-complementary: #1f1f23, #231f23
- Tetradic: #1f2323, #211f23, #231f1f

## Colors that go with #21231f

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black that reads cleanly against #21231f without the hard edge of pure #000. Seen in: Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), HubSpot (https://brandsweets.com/colors/brands/hubspot-com), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/charcoal
- **Amber** #ffbf00 [pool] — Amber is paired with #21231f in 18 real palettes, including Wikipedia's brand system and Google's brand system, as the accent. Seen in: Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Google (https://brandsweets.com/colors/brands/google-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Trailhead (https://brandsweets.com/palettes/warm#trailhead). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 24 real palettes, including Rolex's brand system and Bumble's brand system put Blue beside #21231f, as the accent. Seen in: Rolex (https://brandsweets.com/colors/brands/rolex-com), Bumble (https://brandsweets.com/colors/brands/bumble-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Signal (https://brandsweets.com/colors/brands/signal-org). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #21231f in 10 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour. Seen in: ClickUp (https://brandsweets.com/colors/brands/clickup-com), Yahoo (https://brandsweets.com/colors/brands/yahoo-com), Prepare your taste buds... (https://brandsweets.com/colors/brands/grubhub-com), Klarna US (https://brandsweets.com/colors/brands/klarna-com). — https://brandsweets.com/colors/blueviolet
- **Blush Pink** #e8b4b8 [pool] — 6 real palettes, including Graphite Mono and Rain Garden put Blush Pink beside #21231f, as the accent. Seen in: Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Blush (https://brandsweets.com/palettes/light#blush), Estate (https://brandsweets.com/palettes/luxury#estate). — https://brandsweets.com/colors/blush-pink
- **Brown** #a52a2a [pool] — 5 real palettes, including Woodsmoke and Typewriter put Brown beside #21231f, as the accent. Seen in: Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), Typewriter (https://brandsweets.com/palettes/editorial#typewriter), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Garnet (https://brandsweets.com/palettes/warm#garnet). — https://brandsweets.com/colors/brown
- **Burlywood** #deb887 [pool] — Burlywood is paired with #21231f in 6 real palettes, including Kiln and Chalkboard, as the accent. Seen in: Kiln (https://brandsweets.com/palettes/dark#kiln), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/burlywood
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #21231f: 10 real palettes, including Paper & Pine and SoFi's brand system, as the supporting colour. Seen in: Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), SoFi (https://brandsweets.com/colors/brands/sofi-com), Diner (https://brandsweets.com/palettes/vivid#diner), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue

## Contrast (WCAG 2.x, as text)

- On white (#ffffff): 15.85:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.32:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #707769 (4.53:1); AA: background → #8a8a8a (4.59:1); AAA: text → #91988b (7.07:1); AAA: background → #adadad (7.06:1)

## Brands using this color

- **Todoist** — text #25221e (Δ 0.76) — https://brandsweets.com/colors/brands/todoist-com
- **Acer** — text #222222 (Δ 0.796) — https://brandsweets.com/colors/brands/acer-com
- **Airbnb** — text #222222 (Δ 0.796) — https://brandsweets.com/colors/brands/airbnb
- **AliExpress** — primary #222222 (Δ 0.796) — https://brandsweets.com/colors/brands/aliexpress-com
- **AliExpress** — text #222222 (Δ 0.796) — https://brandsweets.com/colors/brands/aliexpress-com
- **Nikon** — primary #222222 (Δ 0.796) — https://brandsweets.com/colors/brands/nikon-com
- **Nikon** — text #222222 (Δ 0.796) — https://brandsweets.com/colors/brands/nikon-com
- **Cohere** — text #212121 (Δ 0.928) — https://brandsweets.com/colors/brands/cohere-com
- **Postman** — text #212121 (Δ 0.928) — https://brandsweets.com/colors/brands/postman-com
- **Rolex** — text #212121 (Δ 0.928) — https://brandsweets.com/colors/brands/rolex-com
- **SoFi** — primary #212121 (Δ 0.928) — https://brandsweets.com/colors/brands/sofi-com
- **SoFi** — text #212121 (Δ 0.928) — https://brandsweets.com/colors/brands/sofi-com
- **Wikipedia** — primary #202122 (Δ 1.083) — https://brandsweets.com/colors/brands/wikipedia-org
- **Wikipedia** — text #202122 (Δ 1.083) — https://brandsweets.com/colors/brands/wikipedia-org
- **Retool** — primary #242424 (Δ 1.11) — https://brandsweets.com/colors/brands/retool-com
- **Bumble** — primary #202020 (Δ 1.202) — https://brandsweets.com/colors/brands/bumble-com
- **Bumble** — text #202020 (Δ 1.202) — https://brandsweets.com/colors/brands/bumble-com
- **ClickUp** — text #202020 (Δ 1.202) — https://brandsweets.com/colors/brands/clickup-com
- **Lamborghini** — primary #202020 (Δ 1.202) — https://brandsweets.com/colors/brands/lamborghini-com
- **Lamborghini** — text #202020 (Δ 1.202) — https://brandsweets.com/colors/brands/lamborghini-com
- **Cursor** — text #26251e (Δ 1.255) — https://brandsweets.com/colors/brands/cursor-com
- **GitLab** — text #1f1f1f (Δ 1.546) — https://brandsweets.com/colors/brands/gitlab
- **Google** — text #1f1f1f (Δ 1.546) — https://brandsweets.com/colors/brands/google-com
- **HubSpot** — text #1f1f1f (Δ 1.546) — https://brandsweets.com/colors/brands/hubspot-com
- **Revolut** — text #1f1f1f (Δ 1.546) — https://brandsweets.com/colors/brands/revolut-com
- **GitHub** — text #1f2328 (Δ 1.707) — https://brandsweets.com/colors/brands/github
- **7-Eleven** — primary #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/7-eleven-com
- **7-Eleven** — text #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/7-eleven-com
- **AMD** — primary #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/amd-com
- **AMD** — text #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/amd-com
- **Boeing** — text #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/boeing-com
- **Calvin Klein** — primary #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/calvinklein-us
- **Calvin Klein** — text #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/calvinklein-us
- **Datadog** — text #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/datadoghq-com
- **Tommy Hilfiger** — primary #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/tommy-com
- **Tommy Hilfiger** — text #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/tommy-com
- **Trader Joe's** — primary #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/traderjoes-com
- **Trader Joe's** — text #212529 (Δ 1.783) — https://brandsweets.com/colors/brands/traderjoes-com
- **Chevrolet** — primary #262626 (Δ 1.791) — https://brandsweets.com/colors/brands/chevrolet-com
- **Chevrolet** — text #262626 (Δ 1.791) — https://brandsweets.com/colors/brands/chevrolet-com
- **Cloudflare** — text #262626 (Δ 1.791) — https://brandsweets.com/colors/brands/cloudflare
- **Obsidian** — text #262626 (Δ 1.791) — https://brandsweets.com/colors/brands/obsidian-md
- **Svelte** — text #262626 (Δ 1.791) — https://brandsweets.com/colors/brands/svelte-dev
- **Apple** — primary #221e1f (Δ 1.805) — https://brandsweets.com/colors/brands/apple-com
- **Figma** — text #1e1e1e (Δ 1.924) — https://brandsweets.com/colors/brands/figma
- **Zed** — text #242529 (Δ 1.939) — https://brandsweets.com/colors/brands/zed-dev
- **AT&T** — primary #1d2329 (Δ 1.952) — https://brandsweets.com/colors/brands/att-com
- **AT&T** — text #1d2329 (Δ 1.952) — https://brandsweets.com/colors/brands/att-com

## Curated palettes containing it

- **Wellness** (warm, muted, friendly) — #5f8460, #a8896a, #c6633f, #fbf7f2, #2a2320 — Sage and terracotta feel natural and calm — the anti-hospital palette for wellbeing brands. — tool: https://brandsweets.com/palettes/new/5f8460-a8896a-c6633f-fbf7f2-2a2320 — collection: https://brandsweets.com/palettes/warm
- **Fresh Juice** (playful, vivid, light) — #ff6b35, #ffd166, #06d6a0, #ffffff, #1f1f1f — Orange, mango and mint — a sugar rush; keep the type black so it stays legible under all that color. — tool: https://brandsweets.com/palettes/new/ff6b35-ffd166-06d6a0-ffffff-1f1f1f — collection: https://brandsweets.com/palettes/playful
- **Forest Floor** (dark, muted, warm) — #8fae6a, #6b7a5a, #d9a05b, #1b2419, #e9e6dc — Moss and bark with a mushroom-cap amber — grounded and quiet, made for long-form nature content. — tool: https://brandsweets.com/palettes/new/8fae6a-6b7a5a-d9a05b-1b2419-e9e6dc — collection: https://brandsweets.com/palettes/dark
- **Crayon Box** (playful, vivid, friendly) — #ff5e5b, #00cecb, #ffed66, #ffffff, #222222 — Red, teal and yellow at crayon saturation — joyful, but on white with black type so it stays readable for grown-ups. — tool: https://brandsweets.com/palettes/new/ff5e5b-00cecb-ffed66-ffffff-222222 — collection: https://brandsweets.com/palettes/playful
- **Retro Pop** (playful, bold, warm) — #e63946, #457b9d, #f4a261, #fff4e0, #23201c — Fifties-diner red and steel blue with a peach — nostalgic pop that still passes contrast. — tool: https://brandsweets.com/palettes/new/e63946-457b9d-f4a261-fff4e0-23201c — collection: https://brandsweets.com/palettes/playful
- **Paper & Pine** (minimal, cool, clean, muted) — #1f4d3a, #8aa39b, #d98c3f, #f7f7f4, #1c2321 — Deep pine on paper-white with a marmalade accent — a quiet, sustainable-brand palette that isn't beige. — tool: https://brandsweets.com/palettes/new/1f4d3a-8aa39b-d98c3f-f7f7f4-1c2321 — collection: https://brandsweets.com/palettes/minimal
- **Clay & Linen** (earthy, warm, muted) — #b5654d, #8f8168, #5c6b47, #f5efe6, #2a231d — Terracotta, stone and olive on linen — the earth-tone default for ceramics, skincare and anything hand-made. — tool: https://brandsweets.com/palettes/new/b5654d-8f8168-5c6b47-f5efe6-2a231d — collection: https://brandsweets.com/palettes/earthy
- **Desert Road** (earthy, warm, muted, elegant) — #c2703d, #c9b28b, #3e5f5c, #fbf6ee, #2b211a — Sandstone and sand with a deep teal — the one cool note makes the warm colours look intentional rather than beige. — tool: https://brandsweets.com/palettes/new/c2703d-c9b28b-3e5f5c-fbf6ee-2b211a — collection: https://brandsweets.com/palettes/earthy
- **Riverbed** (earthy, muted, cool) — #5f7a6b, #a89f91, #b7742f, #f4f3ef, #22281f — Wet-stone green and pebble grey with a copper accent — an earth palette that leans cool, for outdoor and wellness. — tool: https://brandsweets.com/palettes/new/5f7a6b-a89f91-b7742f-f4f3ef-22281f — collection: https://brandsweets.com/palettes/earthy
- **Kiln** (earthy, dark, warm) — #d17f4a, #9c8b7a, #e7c9a1, #2a221d, #f3ebe1 — Fired clay and ash on a dark umber — the earthy dark mode; warm enough that the dark surface reads as material, not void. — tool: https://brandsweets.com/palettes/new/d17f4a-9c8b7a-e7c9a1-2a221d-f3ebe1 — collection: https://brandsweets.com/palettes/earthy
- **Graphite Mono** (monochrome, neutral, minimal, modern) — #222222, #767676, #bdbdbd, #fafafa, #111111 — Five greys, no hue — the true monochrome; the accent is a lighter grey, so hierarchy comes from weight and size alone. — tool: https://brandsweets.com/palettes/new/222222-767676-bdbdbd-fafafa-111111 — collection: https://brandsweets.com/palettes/monochrome

## Fonts for this mood

- neutral: https://brandsweets.com/fonts/mood/neutral
- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/21231f-a2beb0-c859d4-1f2d2b-eaf1e9?lock=0&style=vibrant
(Humans lock/regenerate in the tool; the URL is the state — read `lock=` back to see what they kept.)

## Connect an agent

Point any MCP client at the BrandSweets colors endpoint for the same engine:

- Endpoint: https://mcp.brandsweets.com/colors/mcp
- Tools: `analyze_color` (e.g. `analyze_color({ color: "#21231f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.