# #121b03

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

## Values

- Hex: `#121b03`
- RGB: rgb(18, 27, 3)
- HSL: hsl(83, 80%, 6%)
- OKLCH: oklch(0.206 0.046 126.4)
- Relative luminance: 0.0092
- Nearest named color: Nightmare (#112211, Δ 2.891) — https://brandsweets.com/colors/nightmare
- Moods: vivid, dark, luxury, bold
- Page: https://brandsweets.com/colors/121b03

## Tints & shades

- Tints (toward white): #2d4508, #496e0c, #679c11, #82c516, #9be723, #aeeb4c, #c1f075, #d6f5a3, #e8f9cd, #fbfef6
- Shades (toward black): #121c03, #121c03, #0f1703, #0f1703, #0f1703, #0f1703, #0f1703, #0c1202, #0c1202, #0c1202

## Harmonies

- Complementary: #0c031c
- Analogous: #1c1903, #061c03
- Triadic: #03121c, #1c0312
- Split-complementary: #03061c, #19031c
- Tetradic: #031c19, #0c031c, #1c0306

## Colors that go with #121b03

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

- **Blue Violet** #8a2be2 [harmony, pool: complementary] — Blue Violet sits directly opposite #121b03 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: 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), Taco Bell (https://brandsweets.com/colors/brands/tacobell-com). — https://brandsweets.com/colors/blueviolet
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #121b03: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Sweetgreen (https://brandsweets.com/colors/brands/sweetgreen-com), Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Puma (https://brandsweets.com/colors/brands/puma-com), Hinge (https://brandsweets.com/colors/brands/hinge-co). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #121b03 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Huawei (https://brandsweets.com/colors/brands/huawei-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Diner (https://brandsweets.com/palettes/vivid#diner), Behance (https://brandsweets.com/colors/brands/behance-net). — https://brandsweets.com/colors/crimson
- **Royal Blue** #4169e1 [harmony, pool: split] — Royal Blue is a split-complement of #121b03: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Guinness (https://brandsweets.com/colors/brands/guinness-com), IBM (https://brandsweets.com/colors/brands/ibm-com), GitHub (https://brandsweets.com/colors/brands/github), Yahoo (https://brandsweets.com/colors/brands/yahoo-com). — https://brandsweets.com/colors/royalblue
- **Sea Green** #2e8b57 [harmony, pool: analogous] — Sea Green is #121b03's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Next.js (https://brandsweets.com/colors/brands/nextjs-org), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Asana (https://brandsweets.com/colors/brands/asana-com), Kia (https://brandsweets.com/colors/brands/kia-com). — https://brandsweets.com/colors/seagreen
- **Steel Blue** #4682b4 [harmony, pool: triadic] — Steel Blue completes a triad with #121b03 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Launch Orange (https://brandsweets.com/palettes/bold#launch-orange), American Express (https://brandsweets.com/colors/brands/americanexpress-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Wired (https://brandsweets.com/colors/brands/wired-com). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #121b03 in 18 real palettes, including Trailhead and Warner Bros.'s brand system, as the accent. Seen in: Trailhead (https://brandsweets.com/palettes/warm#trailhead), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave), Maple (https://brandsweets.com/palettes/warm#maple). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 24 real palettes, including CVS's brand system and Signal's brand system put Blue beside #121b03, as the supporting colour. Seen in: CVS (https://brandsweets.com/colors/brands/cvs-com), Signal (https://brandsweets.com/colors/brands/signal-org), native Cybersecurity (https://brandsweets.com/colors/brands/crowdstrike-com), EA (https://brandsweets.com/colors/brands/ea-com). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 17.74:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.18:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #55810e (4.53:1); AA: background → #828282 (4.62:1); AAA: text → #6da512 (7.04:1); AAA: background → #a3a3a3 (7.03:1)

## 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/121b03-b0bea2-4e5ddf-222d1f-f1f0e9?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: "#121b03" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.