# #40370d

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

## Values

- Hex: `#40370d`
- RGB: rgb(64, 55, 13)
- HSL: hsl(49, 66%, 15%)
- OKLCH: oklch(0.337 0.06 96.8)
- Relative luminance: 0.0385
- Nearest named color: Dark Olive (#373e02, Δ 3.088) — https://brandsweets.com/colors/dark-olive
- Moods: warm, vivid, dark, playful, bold, luxury
- Page: https://brandsweets.com/colors/40370d

## Tints & shades

- Tints (toward white): #615314, #87741c, #a99123, #cbae2a, #dabf49, #e1cb6b, #e8d78d, #efe3af, #f6f0d5, #fdfcf7
- Shades (toward black): #3b330c, #372f0b, #332b0a, #2f280a, #2a2409, #221d07, #1e1906, #191605, #151204, #110e03

## Harmonies

- Complementary: #0d163f
- Analogous: #3f1d0d, #303f0d
- Triadic: #0d3f36, #360d3f
- Split-complementary: #0d303f, #1d0d3f
- Tetradic: #0d3f1d, #0d163f, #3f0d30

## Colors that go with #40370d

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

- **Royal Blue** #4169e1 [harmony, pool: complementary] — Royal Blue sits directly opposite #40370d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Headspace (https://brandsweets.com/colors/brands/headspace-com), Rotten Tomatoes (https://brandsweets.com/colors/brands/rottentomatoes-com), Docker (https://brandsweets.com/colors/brands/docker-com), Loom (https://brandsweets.com/colors/brands/loom-com). — https://brandsweets.com/colors/royalblue
- **Sienna** #a0522d [harmony, pool: analogous] — Sienna is #40370d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Harvest (https://brandsweets.com/palettes/warm#harvest), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke). — https://brandsweets.com/colors/sienna
- **Steel Blue** #4682b4 [harmony, pool: split] — Steel Blue is a split-complement of #40370d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Auth0 (https://brandsweets.com/colors/brands/auth0-com). — https://brandsweets.com/colors/steelblue
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #40370d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Mid-Century (https://brandsweets.com/palettes/warm#mid-century), N26 (https://brandsweets.com/colors/brands/n26-com), Saffron (https://brandsweets.com/palettes/warm#saffron), Stanley (https://brandsweets.com/colors/brands/stanley1913-com). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #40370d in 6 real palettes, including McDonald's's brand system and Trailhead, as the lead colour. Seen in: McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Trailhead (https://brandsweets.com/palettes/warm#trailhead), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Maple (https://brandsweets.com/palettes/warm#maple). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 9 real palettes, including Dunkin''s brand system and Minecraft's brand system put Blue beside #40370d, as the supporting colour. Seen in: Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Headspace (https://brandsweets.com/colors/brands/headspace-com), Instacart (https://brandsweets.com/colors/brands/instacart-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 5 real palettes, including Garden Wedding and Nursery put Blush Pink beside #40370d, as the supporting colour. Seen in: Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Nursery (https://brandsweets.com/palettes/light#nursery), Blush (https://brandsweets.com/palettes/light#blush), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden). — https://brandsweets.com/colors/blush-pink
- **Cream** #fffdd0 [role] — Cream is the surface #40370d wants: a warm off-white that shares its undertone, so #40370d reads softer on it than on pure white. — https://brandsweets.com/colors/cream

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

- On white (#ffffff): 11.86:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.77:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #87741c (4.55:1); AA: background → #a1a1a1 (4.59:1); AAA: text → #ae9424 (7.06:1); AAA: background → #c7c7c7 (7.02:1)

## Fonts for this mood

- warm: https://brandsweets.com/fonts/mood/warm
- playful: https://brandsweets.com/fonts/mood/playful
- bold: https://brandsweets.com/fonts/mood/bold
- luxury: https://brandsweets.com/fonts/mood/luxury

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/40370d-c4c19c-4eaedf-2a2d1f-f1ece9?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: "#40370d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.