# #100218

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

## Values

- Hex: `#100218`
- RGB: rgb(16, 2, 24)
- HSL: hsl(278, 85%, 5%)
- OKLCH: oklch(0.137 0.055 313)
- Relative luminance: 0.0022
- Nearest named color: Glossy Black (#110011, Δ 1.958) — https://brandsweets.com/colors/glossy-black
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/100218

## Tints & shades

- Tints (toward white): #2c0542, #4b0971, #670d9c, #8310c6, #a01ded, #b247f0, #c471f4, #d69cf7, #e9cbfb, #fbf6fe
- Shades (toward black): #100218, #100218, #100218, #100218, #100218, #0d0213, #0d0213, #0d0213, #0d0213, #0d0213

## Harmonies

- Complementary: #0a1802
- Analogous: #050218, #180215
- Triadic: #181002, #021810
- Split-complementary: #151802, #021805
- Tetradic: #180502, #0a1802, #021518

## Colors that go with #100218

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 #100218: softer than #000 and cool enough to feel like part of the same palette. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Amazon (https://brandsweets.com/colors/brands/amazon-com), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: complementary] — Sea Green sits directly opposite #100218 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Asana (https://brandsweets.com/colors/brands/asana-com), Intel (https://brandsweets.com/colors/brands/intel-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: triadic] — Sienna completes a triad with #100218 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Oatly (https://brandsweets.com/colors/brands/oatly-com), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets). — https://brandsweets.com/colors/sienna
- **Slate Blue** #6a5acd [harmony, pool: analogous] — Slate Blue is #100218's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Sentry (https://brandsweets.com/colors/brands/sentry-io), Linear (https://brandsweets.com/colors/brands/linear), Calm (https://brandsweets.com/colors/brands/calm-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/slateblue
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #100218 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Redfin (https://brandsweets.com/colors/brands/redfin-com), Clinic (https://brandsweets.com/palettes/clean#clinic), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #100218 in 14 real palettes, including Southwest Airlines's brand system and Lemon Squeezy's brand system, as the accent. Seen in: Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 17 real palettes, including Pfizer's brand system and Glossier's brand system put Blue beside #100218, as the supporting colour. Seen in: Pfizer (https://brandsweets.com/colors/brands/pfizer-com), Glossier (https://brandsweets.com/colors/brands/glossier-com), Uber (https://brandsweets.com/colors/brands/uber-com), native Cybersecurity (https://brandsweets.com/colors/brands/crowdstrike-com). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #100218 in 10 real palettes, including Gemstone and Circuit, as the supporting colour. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Circuit (https://brandsweets.com/palettes/technical#circuit), Twitch (https://brandsweets.com/colors/brands/twitch-tv), Render (https://brandsweets.com/colors/brands/render-com). — https://brandsweets.com/colors/blueviolet

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

- On white (#ffffff): 20.12:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.04:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #ac39ef (4.59:1); AA: background → #787878 (4.56:1); AAA: text → #c471f4 (7.02:1); AAA: background → #999999 (7.06:1)

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern
- 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/100218-ba9cc4-bbcb62-2d1f2c-ebe9f1?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: "#100218" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.