# #40b0b0

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

## Values

- Hex: `#40b0b0`
- RGB: rgb(64, 176, 176)
- HSL: hsl(180, 47%, 47%)
- OKLCH: oklch(0.695 0.099 195.1)
- Relative luminance: 0.3528
- Nearest named color: lightseagreen (#20b2aa, Δ 1.908) — https://brandsweets.com/colors/lightseagreen
- Moods: cool, modern
- Page: https://brandsweets.com/colors/40b0b0

## Tints & shades

- Tints (toward white): #4bbebe, #5ec5c5, #71cccc, #83d2d2, #9adbdb, #ade1e1, #bfe8e8, #d2efef, #e5f6f6, #f8fcfc
- Shades (toward black): #3aa1a1, #338e8e, #2e7f7f, #297070, #236161, #1c4f4f, #174040, #123131, #0b1e1e, #050f0f

## Harmonies

- Complementary: #b04040
- Analogous: #40b078, #4078b0
- Triadic: #b040b0, #b0b040
- Split-complementary: #b04078, #b07840
- Tetradic: #7840b0, #b04040, #78b040

## Colors that go with #40b0b0

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 #40b0b0: softer than #000 and cool enough to feel like part of the same palette. Seen in: N26 (https://brandsweets.com/colors/brands/n26-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Lido (https://brandsweets.com/palettes/vivid#lido), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #40b0b0 in 4 real palettes, including Undergrowth and Forest Floor, as the supporting colour. Seen in: Undergrowth (https://brandsweets.com/palettes/dark#undergrowth), Forest Floor (https://brandsweets.com/palettes/dark#forest-floor), Warp (https://brandsweets.com/colors/brands/warp-dev), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal). — https://brandsweets.com/colors/darkolivegreen
- **Denim** #1560bd [pool] — Designers have shipped Denim with #40b0b0: 6 real palettes, including Open House and Coca-Cola's brand system, as the lead colour. Seen in: Open House (https://brandsweets.com/palettes/clean#open-house), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Peacock (https://brandsweets.com/palettes/vivid#peacock), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #40b0b0: 6 real palettes, including Unity's brand system and Patreon's brand system, as the lead colour. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Patreon (https://brandsweets.com/colors/brands/patreon-com), Figma (https://brandsweets.com/colors/brands/figma), Studio Grey (https://brandsweets.com/palettes/minimal#studio-grey). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 8 real palettes, including Ford's brand system and Confluent's brand system put Midnight Blue beside #40b0b0, as the lead colour. Seen in: Ford (https://brandsweets.com/colors/brands/ford-com), Confluent (https://brandsweets.com/colors/brands/confluent-io), SoFi (https://brandsweets.com/colors/brands/sofi-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/midnightblue
- **Mustard Yellow** #ffdb58 [pool] — 4 real palettes, including Lido and Diner put Mustard Yellow beside #40b0b0, as the accent. Seen in: Lido (https://brandsweets.com/palettes/vivid#lido), Diner (https://brandsweets.com/palettes/vivid#diner), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice). — https://brandsweets.com/colors/mustard
- **Orange** #ffa500 [pool] — 4 real palettes, including Mint Modern and Graphite put Orange beside #40b0b0, as the accent. Seen in: Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Graphite (https://brandsweets.com/palettes/technical#graphite), Gopro (https://brandsweets.com/colors/brands/gopro-com), Mistral AI (https://brandsweets.com/colors/brands/mistral-ai). — https://brandsweets.com/colors/orange
- **Terracotta** #e2725b [harmony, pool: split] — Terracotta is a split-complement of #40b0b0: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Resort (https://brandsweets.com/palettes/light#resort), Alpine (https://brandsweets.com/palettes/cool#alpine), Harbour (https://brandsweets.com/palettes/cool#harbour). — https://brandsweets.com/colors/terracotta

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

- On white (#ffffff): 2.61:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #2e7f7f (4.71:1); AA: background → #363636 (4.64:1); AAA: text → #236161 (7.11:1); AAA: background → #141414 (7.07:1)
- On black (#000000): 8.06:1 — AA pass, AA-large pass, AAA pass

## Fonts for this mood

- 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/40b0b0-a2bbbe-d45994-1f272d-e9f1ed?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: "#40b0b0" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.