# #423d6b

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

## Values

- Hex: `#423d6b`
- RGB: rgb(66, 61, 107)
- HSL: hsl(247, 27%, 33%)
- OKLCH: oklch(0.387 0.077 287.2)
- Relative luminance: 0.0556
- Nearest named color: Blue Funk (#2d4470, Δ 3.416) — https://brandsweets.com/colors/blue-funk
- Moods: cool, muted
- Page: https://brandsweets.com/colors/423d6b

## Tints & shades

- Tints (toward white): #514a82, #5d5695, #6e67a8, #817ab3, #9691c0, #a9a4cb, #bebbd8, #d1cee3, #e6e5f0, #f9f9fb
- Shades (toward black): #3d3861, #373257, #312d4e, #2a2744, #26233e, #201e34, #1a182a, #141320, #0e0d17, #08070d

## Harmonies

- Complementary: #666b3d
- Analogous: #3d4f6b, #593d6b
- Triadic: #6b433d, #3d6b43
- Split-complementary: #6b593d, #4f6b3d
- Tetradic: #6b3d4f, #666b3d, #3d6b59

## Colors that go with #423d6b

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

- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #423d6b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Auth0 (https://brandsweets.com/colors/brands/auth0-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Glacier (https://brandsweets.com/palettes/cool#glacier), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 7 real palettes, including Alaska Airlines's brand system and CVS's brand system put Blue beside #423d6b, as the accent. Seen in: Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Jeep (https://brandsweets.com/colors/brands/jeep-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 4 real palettes, including Nursery and Garden Wedding put Blush Pink beside #423d6b, as the lead colour. Seen in: Nursery (https://brandsweets.com/palettes/light#nursery), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Blush (https://brandsweets.com/palettes/light#blush), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden). — https://brandsweets.com/colors/blush-pink
- **Copper** #b87333 [pool] — Designers have shipped Copper with #423d6b: 4 real palettes, including Dusk and Notion's brand system, as the accent. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Notion (https://brandsweets.com/colors/brands/notion), Bramble (https://brandsweets.com/palettes/muted#bramble), Desert Road (https://brandsweets.com/palettes/warm#desert-road). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #423d6b in 8 real palettes, including Marvel's brand system and Codecademy's brand system, as the accent. Seen in: Marvel (https://brandsweets.com/colors/brands/marvel-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #423d6b: 15 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com), Hasbro (https://brandsweets.com/colors/brands/hasbro-com). — https://brandsweets.com/colors/denim
- **Light Sea Green** #20b2aa [pool] — Light Sea Green shows up next to #423d6b in 4 real palettes, including Confluent's brand system and Lagoon, as the accent. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Taco Bell (https://brandsweets.com/colors/brands/tacobell-com), Lido (https://brandsweets.com/palettes/vivid#lido). — https://brandsweets.com/colors/lightseagreen
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #423d6b: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 9.95:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.11:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #746dab (4.52:1); AA: background → #b0b0b0 (4.59:1); AAA: text → #9691c0 (7.11:1); AAA: background → #d9d9d9 (7.05:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/423d6b-a59cc4-dfaa4e-271f2d-e9ecf1?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: "#423d6b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.