# #66bb63

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

## Values

- Hex: `#66bb63`
- RGB: rgb(102, 187, 99)
- HSL: hsl(118, 39%, 56%)
- OKLCH: oklch(0.717 0.149 143.2)
- Relative luminance: 0.3927
- Nearest named color: Bermudagrass (#6bc271, Δ 2.358) — https://brandsweets.com/colors/bermudagrass
- Moods: neutral
- Page: https://brandsweets.com/colors/66bb63

## Tints & shades

- Tints (toward white): #74c171, #82c77f, #93cf91, #a1d59f, #afdbad, #bde1bc, #cbe8ca, #dcefdc, #eaf6ea, #f8fcf8
- Shades (toward black): #55b351, #4ba348, #418e3e, #397c36, #316a2f, #295927, #20471f, #173216, #0f200e, #060e06

## Harmonies

- Complementary: #b863bb
- Analogous: #92bb63, #63bb8c
- Triadic: #6366bb, #bb6366
- Split-complementary: #8c63bb, #bb6392
- Tetradic: #6392bb, #b863bb, #bb8c63

## Colors that go with #66bb63

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 body-text near-black for #66bb63: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Zendesk (https://brandsweets.com/colors/brands/zendesk-com), Docker (https://brandsweets.com/colors/brands/docker-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon). — https://brandsweets.com/colors/charcoal
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #66bb63 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), Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com). — https://brandsweets.com/colors/darkolivegreen
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #66bb63 in 5 real palettes, including Brilliant's brand system and Khan Academy's brand system, as the accent. Seen in: Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Khan Academy (https://brandsweets.com/colors/brands/khanacademy-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 #66bb63 in 16 real palettes, including Meadow and Minecraft's brand system, as the text colour against it. Seen in: Meadow (https://brandsweets.com/palettes/light#meadow), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Undergrowth (https://brandsweets.com/palettes/dark#undergrowth), Chime (https://brandsweets.com/colors/brands/chime-com). — https://brandsweets.com/colors/taupe
- **Orchid** #da70d6 [harmony: complementary] — Orchid sits directly opposite #66bb63 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/orchid
- **Blue** #0000ff [pool] — 3 real palettes, including Minecraft's brand system and Unity's brand system put Blue beside #66bb63, as the accent. Seen in: Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Unity (https://brandsweets.com/colors/brands/unity-com), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/blue
- **Cornflower Blue** #6495ed [harmony, pool: triadic] — Cornflower Blue completes a triad with #66bb63 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/cornflowerblue
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #66bb63 in 3 real palettes, including Playground and Citrus Grove, as the lead colour. Seen in: Playground (https://brandsweets.com/palettes/bold#playground), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove), Learning App (https://brandsweets.com/palettes/playful#learning-app). — https://brandsweets.com/colors/darkorange

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

- On white (#ffffff): 2.37:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #3c833a (4.67:1); AA: background → #3d3d3d (4.58:1); AAA: text → #2d632c (7.16:1); AAA: background → #1c1c1c (7.18:1)
- On black (#000000): 8.85:1 — AA pass, AA-large pass, AAA pass

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/66bb63-a2bea4-944edf-1f2d25-edf1e9?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: "#66bb63" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.