# #171b21

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

## Values

- Hex: `#171b21`
- RGB: rgb(23, 27, 33)
- HSL: hsl(216, 18%, 11%)
- OKLCH: oklch(0.221 0.013 258.4)
- Relative luminance: 0.0108
- Nearest named color: Night Demons (#201b20, Δ 1.695) — https://brandsweets.com/colors/night-demons
- Moods: cool, muted, dark, luxury, bold
- Page: https://brandsweets.com/colors/171b21

## Tints & shades

- Tints (toward white): #2a313c, #3b4554, #4d5b6f, #60718a, #7888a1, #909db2, #abb5c4, #c6cdd7, #dee2e8, #f9fafb
- Shades (toward black): #15191e, #15191e, #13161b, #111418, #111418, #0f1115, #0d0f12, #0a0c0f, #0a0c0f, #080a0c

## Harmonies

- Complementary: #211d17
- Analogous: #172021, #181721
- Triadic: #21171b, #1b2117
- Split-complementary: #211817, #202117
- Tetradic: #211720, #211d17, #172118

## Colors that go with #171b21

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 #171b21 without the hard edge of pure #000. Seen in: Vimeo (https://brandsweets.com/colors/brands/vimeo-com), Audi (https://brandsweets.com/colors/brands/audi-com), Asana (https://brandsweets.com/colors/brands/asana-com), Logitech (https://brandsweets.com/colors/brands/logitech-com). — https://brandsweets.com/colors/charcoal
- **Amber** #ffbf00 [pool] — Amber is paired with #171b21 in 18 real palettes, including Warner Bros.'s brand system and Google's brand system, as the accent. Seen in: Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), Google (https://brandsweets.com/colors/brands/google-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Blueprint (https://brandsweets.com/palettes/technical#blueprint). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 25 real palettes, including Signal's brand system and CVS's brand system put Blue beside #171b21, as the supporting colour. Seen in: Signal (https://brandsweets.com/colors/brands/signal-org), CVS (https://brandsweets.com/colors/brands/cvs-com), Warp (https://brandsweets.com/colors/brands/warp-dev), Bumble (https://brandsweets.com/colors/brands/bumble-com). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #171b21 in 10 real palettes, including Yahoo's brand system and ClickUp's brand system, as the supporting colour. Seen in: Yahoo (https://brandsweets.com/colors/brands/yahoo-com), ClickUp (https://brandsweets.com/colors/brands/clickup-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] — 5 real palettes, including Estate and Graphite Mono put Blush Pink beside #171b21, as the accent. Seen in: Estate (https://brandsweets.com/palettes/luxury#estate), Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono), Cartier (https://brandsweets.com/colors/brands/cartier-com), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden). — https://brandsweets.com/colors/blush-pink
- **Brown** #a52a2a [pool] — 5 real palettes, including Woodsmoke and State Farm's brand system put Brown beside #171b21, as the accent. Seen in: Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Garnet (https://brandsweets.com/palettes/warm#garnet), Velvet (https://brandsweets.com/palettes/luxury#velvet). — https://brandsweets.com/colors/brown
- **Burgundy** #800020 [pool] — 4 real palettes, including Qatar Airways's brand system and Mailchimp's brand system put Burgundy beside #171b21, as the accent. Seen in: Qatar Airways (https://brandsweets.com/colors/brands/qatarairways-com), Mailchimp (https://brandsweets.com/colors/brands/mailchimp-com), Candlelight (https://brandsweets.com/palettes/warm#candlelight), Rare Beauty (https://brandsweets.com/colors/brands/rarebeauty-com). — https://brandsweets.com/colors/burgundy
- **Burlywood** #deb887 [pool] — Burlywood is paired with #171b21 in 6 real palettes, including Coffee Bar and Kiln, as the accent. Seen in: Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), Kiln (https://brandsweets.com/palettes/dark#kiln), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard), Velvet (https://brandsweets.com/palettes/luxury#velvet). — https://brandsweets.com/colors/burlywood

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

- On white (#ffffff): 17.28:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.22:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #647690 (4.54:1); AA: background → #858585 (4.68:1); AAA: text → #8a98ad (7.18:1); AAA: background → #a6a6a6 (7.1:1)

## Brands using this color

- **Vimeo** — text #141a20 (Δ 0.689) — https://brandsweets.com/colors/brands/vimeo-com
- **Spline** — text #191a1d (Δ 0.794) — https://brandsweets.com/colors/brands/spline-design
- **Netlify** — text #181a1c (Δ 0.938) — https://brandsweets.com/colors/brands/netlify-com
- **Philips** — primary #15191e (Δ 0.938) — https://brandsweets.com/colors/brands/philips-com
- **Philips** — text #15191e (Δ 0.938) — https://brandsweets.com/colors/brands/philips-com
- **Audi** — secondary #181d25 (Δ 0.956) — https://brandsweets.com/colors/brands/audi-com
- **Asana** — secondary #151b26 (Δ 1.032) — https://brandsweets.com/colors/brands/asana-com
- **Fitbit** — primary #191c1d (Δ 1.033) — https://brandsweets.com/colors/brands/fitbit-com
- **Fitbit** — text #191c1d (Δ 1.033) — https://brandsweets.com/colors/brands/fitbit-com
- **JetBrains** — text #19191c (Δ 1.04) — https://brandsweets.com/colors/brands/jetbrains-com
- **Airtable** — accent #181d26 (Δ 1.092) — https://brandsweets.com/colors/brands/airtable-com
- **Formula 1** — text #1c1c25 (Δ 1.275) — https://brandsweets.com/colors/brands/formula1-com
- **Brave** — primary #1c1c1d (Δ 1.314) — https://brandsweets.com/colors/brands/brave-com
- **Brave** — text #1c1c1d (Δ 1.314) — https://brandsweets.com/colors/brands/brave-com
- **Logitech** — primary #1b1b1b (Δ 1.332) — https://brandsweets.com/colors/brands/logitech-com
- **Logitech** — text #1b1b1b (Δ 1.332) — https://brandsweets.com/colors/brands/logitech-com
- **N26** — text #1b1b1b (Δ 1.332) — https://brandsweets.com/colors/brands/n26-com
- **NASA** — text #1b1b1b (Δ 1.332) — https://brandsweets.com/colors/brands/nasa-gov
- **Signal** — primary #1b1b1b (Δ 1.332) — https://brandsweets.com/colors/brands/signal-org
- **Signal** — text #1b1b1b (Δ 1.332) — https://brandsweets.com/colors/brands/signal-org
- **Hinge** — text #1a1a1a (Δ 1.356) — https://brandsweets.com/colors/brands/hinge-co
- **Louis Vuitton** — primary #1a1a1a (Δ 1.356) — https://brandsweets.com/colors/brands/louisvuitton-com
- **Louis Vuitton** — text #1a1a1a (Δ 1.356) — https://brandsweets.com/colors/brands/louisvuitton-com
- **Spectrum** — primary #1a1a1a (Δ 1.356) — https://brandsweets.com/colors/brands/spectrum-com
- **Spectrum** — text #1a1a1a (Δ 1.356) — https://brandsweets.com/colors/brands/spectrum-com
- **Warner Bros.** — primary #1a1a1a (Δ 1.356) — https://brandsweets.com/colors/brands/warnerbros-com
- **Warner Bros.** — text #1a1a1a (Δ 1.356) — https://brandsweets.com/colors/brands/warnerbros-com
- **Box** — text #151f26 (Δ 1.491) — https://brandsweets.com/colors/brands/box-com
- **WhatsApp** — primary #1c1e21 (Δ 1.509) — https://brandsweets.com/colors/brands/whatsapp-com
- **WhatsApp** — text #1c1e21 (Δ 1.509) — https://brandsweets.com/colors/brands/whatsapp-com
- **Huawei** — text #191919 (Δ 1.51) — https://brandsweets.com/colors/brands/huawei-com
- **Notion** — primary #191919 (Δ 1.51) — https://brandsweets.com/colors/brands/notion
- **Puma** — primary #191919 (Δ 1.51) — https://brandsweets.com/colors/brands/puma-com
- **Puma** — text #191919 (Δ 1.51) — https://brandsweets.com/colors/brands/puma-com
- **CVS** — primary #1a1a19 (Δ 1.532) — https://brandsweets.com/colors/brands/cvs-com
- **CVS** — text #1a1a19 (Δ 1.532) — https://brandsweets.com/colors/brands/cvs-com
- **Yahoo** — primary #1a1919 (Δ 1.535) — https://brandsweets.com/colors/brands/yahoo-com
- **Yahoo** — text #1a1919 (Δ 1.535) — https://brandsweets.com/colors/brands/yahoo-com
- **Qatar Airways** — secondary #181825 (Δ 1.553) — https://brandsweets.com/colors/brands/qatarairways-com
- **Gusto** — primary #1c1b1a (Δ 1.583) — https://brandsweets.com/colors/brands/gusto-com
- **Gusto** — text #1c1b1a (Δ 1.583) — https://brandsweets.com/colors/brands/gusto-com
- **Nokia** — text #1d1e20 (Δ 1.683) — https://brandsweets.com/colors/brands/nokia-com
- **Affirm** — text #101820 (Δ 1.727) — https://brandsweets.com/colors/brands/affirm-com
- **Chase** — text #101820 (Δ 1.727) — https://brandsweets.com/colors/brands/chase-com
- **Character** — primary #11181c (Δ 1.784) — https://brandsweets.com/colors/brands/character-ai
- **Character** — text #11181c (Δ 1.784) — https://brandsweets.com/colors/brands/character-ai
- **Figma** — text #1e1e1e (Δ 1.953) — https://brandsweets.com/colors/brands/figma
- **Tinder** — primary #1b1817 (Δ 1.953) — https://brandsweets.com/colors/brands/tinder-com
- **Tinder** — text #1b1817 (Δ 1.953) — https://brandsweets.com/colors/brands/tinder-com

## Curated palettes containing it

- **Newsprint** (editorial, muted, warm) — #b91c1c, #78716c, #d97706, #f5f1ea, #1c1917 — Ink-black on warm paper with a single red — the broadsheet hierarchy that lets typography lead. — tool: https://brandsweets.com/palettes/new/b91c1c-78716c-d97706-f5f1ea-1c1917 — collection: https://brandsweets.com/palettes/editorial
- **Ink & Paper** (minimal, editorial, clean) — #1b1b1b, #6e6e6e, #1e40af, #fcfbf7 — Two greys and one ink-blue link color: the palette of a well-set book page. — tool: https://brandsweets.com/palettes/new/1b1b1b-6e6e6e-1e40af-fcfbf7 — collection: https://brandsweets.com/palettes/minimal
- **Console Light** (technical, clean, light) — #2563eb, #52525b, #16a34a, #fafafa, #18181b — A sober docs palette: one blue for interactive, one green for success, zinc greys for everything else. — tool: https://brandsweets.com/palettes/new/2563eb-52525b-16a34a-fafafa-18181b — collection: https://brandsweets.com/palettes/technical
- **Graphite** (technical, muted, dark, modern) — #a1a1aa, #71717a, #f59e0b, #18181b, #f4f4f5 — A greyscale system with a single amber — the accent does all the work, so allow one per screen. — tool: https://brandsweets.com/palettes/new/a1a1aa-71717a-f59e0b-18181b-f4f4f5 — collection: https://brandsweets.com/palettes/technical
- **Launch Orange** (bold, warm, vivid, modern) — #ea580c, #1c1917, #0891b2, #ffffff — Orange is the rarest SaaS primary, which is exactly why it stands out on a pricing page; cyan keeps it from feeling like a hardware store. — tool: https://brandsweets.com/palettes/new/ea580c-1c1917-0891b2-ffffff — collection: https://brandsweets.com/palettes/bold
- **Learning App** (playful, vivid, friendly) — #58cc02, #1cb0f6, #ff9600, #ffffff, #1c1c1c — Green, blue and orange at full saturation: the gamified-learning look, where every color is a reward. — tool: https://brandsweets.com/palettes/new/58cc02-1cb0f6-ff9600-ffffff-1c1c1c — collection: https://brandsweets.com/palettes/playful
- **Playground** (bold, playful, warm) — #ff8c00, #3b82f6, #22c55e, #fff8e7, #1d1d1d — Orange, blue and green — the colors of playground equipment; loud, cheerful, obviously for kids. — tool: https://brandsweets.com/palettes/new/ff8c00-3b82f6-22c55e-fff8e7-1d1d1d — collection: https://brandsweets.com/palettes/bold
- **Studio Grey** (minimal, muted, modern) — #1a1a1a, #8c8c8c, #3a86ff, #f2f2f2 — A pure greyscale with a single electric blue — the portfolio palette that makes work look considered. — tool: https://brandsweets.com/palettes/new/1a1a1a-8c8c8c-3a86ff-f2f2f2 — collection: https://brandsweets.com/palettes/minimal
- **Diner** (retro, vivid, playful, bold) — #e63946, #2a9d8f, #f4d35e, #fffdf5, #1d1d1b — Cherry red, mint-teal and butter yellow — chrome-and-vinyl retro; the red does the work, the teal cools it. — tool: https://brandsweets.com/palettes/new/e63946-2a9d8f-f4d35e-fffdf5-1d1d1b — collection: https://brandsweets.com/palettes/retro
- **Fireside** (winter, dark, warm, luxury) — #b23a3a, #2f5d50, #d4a857, #171a1f, #f2ede4 — Cranberry, pine and brass on a charcoal night — the holiday palette without the clichés, because the surface is cold. — tool: https://brandsweets.com/palettes/new/b23a3a-2f5d50-d4a857-171a1f-f2ede4 — collection: https://brandsweets.com/palettes/winter
- **Stone** (neutral, cool, minimal, clean) — #44403c, #a8a29e, #d6d3d1, #fafaf9, #1c1917 — Stone greys with a faint warmth — Tailwind's stone scale used as a whole palette: interfaces that want to disappear. — tool: https://brandsweets.com/palettes/new/44403c-a8a29e-d6d3d1-fafaf9-1c1917 — collection: https://brandsweets.com/palettes/neutral

## Fonts for this mood

- 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/171b21-9ca7c4-df5f4e-201f2d-e9f0f1?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: "#171b21" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.