# #21163b

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

## Values

- Hex: `#21163b`
- RGB: rgb(33, 22, 59)
- HSL: hsl(258, 46%, 16%)
- OKLCH: oklch(0.236 0.069 294.2)
- Relative luminance: 0.0121
- Nearest named color: Midnight Monarch (#1c0f33, Δ 2.716) — https://brandsweets.com/colors/midnight-monarch
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/21163b

## Tints & shades

- Tints (toward white): #322159, #432c77, #553899, #6643b6, #7d5fc4, #957dcf, #ad9ada, #c9bce6, #e1daf1, #f9f8fc
- Shades (toward black): #1f1538, #1d1334, #19112d, #170f29, #150e25, #130c22, #110b1e, #0c0816, #0a0713, #08060f

## Harmonies

- Complementary: #303c16
- Analogous: #161e3c, #34163c
- Triadic: #3c2116, #163c21
- Split-complementary: #3c3416, #1e3c16
- Tetradic: #3c161e, #303c16, #163c34

## Colors that go with #21163b

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 for #21163b: softer than #000 and cool enough to feel like part of the same palette. Seen in: Volkswagen (https://brandsweets.com/colors/brands/vw-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Asana (https://brandsweets.com/colors/brands/asana-com). — https://brandsweets.com/colors/charcoal
- **Dark Olive Green** #556b2f [harmony, pool: complementary] — Dark Olive Green sits directly opposite #21163b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Cohere (https://brandsweets.com/colors/brands/cohere-com), Warp (https://brandsweets.com/colors/brands/warp-dev), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre). — https://brandsweets.com/colors/darkolivegreen
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #21163b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Telehealth (https://brandsweets.com/palettes/modern#telehealth), Penpot (https://brandsweets.com/colors/brands/penpot-app), Slate Workspace (https://brandsweets.com/palettes/minimal#slate-workspace), GEICO (https://brandsweets.com/colors/brands/geico-com). — https://brandsweets.com/colors/royalblue
- **Sea Green** #2e8b57 [harmony, pool: split] — Sea Green is a split-complement of #21163b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com), Next.js (https://brandsweets.com/colors/brands/nextjs-org). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: triadic] — Sienna completes a triad with #21163b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Harvest (https://brandsweets.com/palettes/warm#harvest). — https://brandsweets.com/colors/sienna
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #21163b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Clinic (https://brandsweets.com/palettes/clean#clinic), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Alpine (https://brandsweets.com/palettes/cool#alpine), Lufthansa (https://brandsweets.com/colors/brands/lufthansa-com). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #21163b in 18 real palettes, including Southwest Airlines's brand system and Blueprint, as the accent. Seen in: Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 21 real palettes, including Sketch's brand system and Monzo's brand system put Blue beside #21163b, as the accent. Seen in: Sketch (https://brandsweets.com/colors/brands/sketch-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Penpot (https://brandsweets.com/colors/brands/penpot-app), Warp (https://brandsweets.com/colors/brands/warp-dev). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 16.9:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.24:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #8063c5 (4.51:1); AA: background → #858585 (4.58:1); AAA: text → #a18cd4 (7.22:1); AAA: background → #a8a8a8 (7.11:1)

## Brands using this color

- **SoFi** — accent #1f1645 (Δ 1.948) — https://brandsweets.com/colors/brands/sofi-com

## Fonts for this mood

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

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/21163b-ad9cc4-dfc44e-291f2d-e9ebf1?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: "#21163b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.