# #1cb591

A color — vivid. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#1cb591`
- RGB: rgb(28, 181, 145)
- HSL: hsl(166, 73%, 41%)
- OKLCH: oklch(0.691 0.13 171.2)
- Relative luminance: 0.3534
- Nearest named color: Hobgoblin (#01ad8f, Δ 2.481) — https://brandsweets.com/colors/hobgoblin
- Moods: vivid
- Page: https://brandsweets.com/colors/1cb591

## Tints & shades

- Tints (toward white): #20cfa7, #2bdeb4, #46e2be, #60e6c7, #7bead0, #91eed8, #abf2e1, #c6f6eb, #dcf9f3, #f6fefc
- Shades (toward black): #19a383, #179678, #15846a, #12735c, #106551, #0d5443, #0a4235, #083127, #06231c, #03120e

## Harmonies

- Complementary: #b51c40
- Analogous: #1cb545, #1c8cb5
- Triadic: #911cb5, #b5911c
- Split-complementary: #b51c8c, #b5451c
- Tetradic: #451cb5, #b51c40, #8cb51c

## Colors that go with #1cb591

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 #1cb591: softer than #000 and cool enough to feel like part of the same palette. Seen in: Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), N26 (https://brandsweets.com/colors/brands/n26-com), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal
- **Hot Pink** #ff69b4 [harmony, pool: complementary] — Hot Pink sits directly opposite #1cb591 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal). — https://brandsweets.com/colors/hotpink
- **Blue** #0000ff [pool] — 4 real palettes, including Unity's brand system and Spotify's brand system put Blue beside #1cb591, as the supporting colour. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Spotify (https://brandsweets.com/colors/brands/spotify), Canva (https://brandsweets.com/colors/brands/canva-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net). — https://brandsweets.com/colors/blue
- **Midnight Blue** #191970 [pool] — 6 real palettes, including Fintech Trust and Ford's brand system put Midnight Blue beside #1cb591, as the text colour against it. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Ford (https://brandsweets.com/colors/brands/ford-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Telehealth (https://brandsweets.com/palettes/modern#telehealth). — https://brandsweets.com/colors/midnightblue
- **Mustard Yellow** #ffdb58 [pool] — 5 real palettes, including Diner and Fresh Juice put Mustard Yellow beside #1cb591, as the accent. Seen in: Diner (https://brandsweets.com/palettes/vivid#diner), Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Meadow (https://brandsweets.com/palettes/light#meadow). — https://brandsweets.com/colors/mustard
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #1cb591 in 6 real palettes, including Khan Academy's brand system and Brilliant's brand system, as the accent. Seen in: Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org), Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Docker (https://brandsweets.com/colors/brands/docker-com), Console Light (https://brandsweets.com/palettes/technical#console-light). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #1cb591 in 13 real palettes, including Chime's brand system and Resort, as the lead colour. Seen in: Chime (https://brandsweets.com/colors/brands/chime-com), Resort (https://brandsweets.com/palettes/light#resort), Undergrowth (https://brandsweets.com/palettes/dark#undergrowth), Obsidian (https://brandsweets.com/colors/brands/obsidian-md). — https://brandsweets.com/colors/taupe
- **Tomato** #ff6347 [harmony, pool: split] — Tomato is a split-complement of #1cb591: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Lido (https://brandsweets.com/palettes/vivid#lido). — https://brandsweets.com/colors/tomato

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

- On white (#ffffff): 2.6:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #15846a (4.63:1); AA: background → #383838 (4.5:1); AAA: text → #0f614e (7.39:1); AAA: background → #141414 (7.08:1)
- On black (#000000): 8.07:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Khan Academy** — secondary #0cbc94 (Δ 1.949) — https://brandsweets.com/colors/brands/khanacademy-org
- **Khan Academy** — primary #14bc94 (Δ 1.965) — https://brandsweets.com/colors/brands/khanacademy-org

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/1cb591-a2bebb-d459b1-1f2a2d-e9f1ec?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: "#1cb591" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.